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https://github.com/systemd/systemd
synced 2024-10-06 16:21:34 +00:00
systemd-analyze: refactor security_info to make use of existing struct variables
In the original implementation of the security_info struct, the struct variables receive its values via dbus protocol. We want to make use of existing structs ExecContext, Unit, and CGroupContext to assign values to the security_info variables instead of relying on dbus for the same. This is possible since these pre-defined structs already contain all the variables that security_info needs to perform security reviews on unit files that are passed to it in the command line.
This commit is contained in:
Maanya Goenka
parent
5ef8b072e9
commit
1624114d74
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@ -2,6 +2,7 @@
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#include <sys/utsname.h>
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#include "af-list.h"
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#include "analyze-security.h"
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#include "bus-error.h"
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#include "bus-map-properties.h"
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@ -21,14 +22,16 @@
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#if HAVE_SECCOMP
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# include "seccomp-util.h"
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#endif
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#include "service.h"
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#include "set.h"
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#include "stdio-util.h"
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#include "strv.h"
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#include "terminal-util.h"
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#include "unit-def.h"
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#include "unit-name.h"
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#include "unit-serialize.h"
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struct security_info {
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typedef struct SecurityInfo {
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char *id;
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char *type;
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char *load_state;
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@ -81,7 +84,7 @@ struct security_info {
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bool restrict_address_family_packet;
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bool restrict_address_family_other;
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uint64_t restrict_namespaces;
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unsigned long long restrict_namespaces;
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bool restrict_realtime;
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bool restrict_suid_sgid;
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@ -92,13 +95,13 @@ struct security_info {
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char *device_policy;
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bool device_allow_non_empty;
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char **system_call_architectures;
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Set *system_call_architectures;
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bool system_call_filter_allow_list;
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Set *system_call_filter;
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Hashmap *system_call_filter;
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uint32_t _umask;
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};
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mode_t _umask;
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} SecurityInfo;
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struct security_assessor {
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const char *id;
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@ -110,7 +113,7 @@ struct security_assessor {
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uint64_t range;
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int (*assess)(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description);
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@ -119,9 +122,24 @@ struct security_assessor {
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bool default_dependencies_only;
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};
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static void security_info_free(struct security_info *i) {
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static SecurityInfo *security_info_new(void) {
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SecurityInfo *info = new(SecurityInfo, 1);
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if (!info)
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return NULL;
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*info = (SecurityInfo) {
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.default_dependencies = true,
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.capability_bounding_set = UINT64_MAX,
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.restrict_namespaces = UINT64_MAX,
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._umask = 0002,
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};
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return info;
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}
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static SecurityInfo *security_info_free(SecurityInfo *i) {
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if (!i)
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return;
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return NULL;
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free(i->id);
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free(i->type);
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@ -144,12 +162,16 @@ static void security_info_free(struct security_info *i) {
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free(i->device_policy);
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strv_free(i->supplementary_groups);
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strv_free(i->system_call_architectures);
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set_free(i->system_call_architectures);
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set_free(i->system_call_filter);
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hashmap_free(i->system_call_filter);
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return mfree(i);
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}
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static bool security_info_runs_privileged(const struct security_info *i) {
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DEFINE_TRIVIAL_CLEANUP_FUNC(SecurityInfo*, security_info_free);
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static bool security_info_runs_privileged(const SecurityInfo *i) {
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assert(i);
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if (STRPTR_IN_SET(i->user, "0", "root"))
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@ -163,7 +185,7 @@ static bool security_info_runs_privileged(const struct security_info *i) {
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static int assess_bool(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -182,7 +204,7 @@ static int assess_bool(
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static int assess_user(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -219,7 +241,7 @@ static int assess_user(
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static int assess_protect_home(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -261,7 +283,7 @@ static int assess_protect_home(
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static int assess_protect_system(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -303,7 +325,7 @@ static int assess_protect_system(
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static int assess_root_directory(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -321,7 +343,7 @@ static int assess_root_directory(
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static int assess_capability_bounding_set(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -337,7 +359,7 @@ static int assess_capability_bounding_set(
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static int assess_umask(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -378,7 +400,7 @@ static int assess_umask(
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static int assess_keyring_mode(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -394,7 +416,7 @@ static int assess_keyring_mode(
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static int assess_protect_proc(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -416,7 +438,7 @@ static int assess_protect_proc(
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static int assess_proc_subset(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -432,7 +454,7 @@ static int assess_proc_subset(
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static int assess_notify_access(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -448,7 +470,7 @@ static int assess_notify_access(
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static int assess_remove_ipc(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -467,7 +489,7 @@ static int assess_remove_ipc(
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static int assess_supplementary_groups(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -486,7 +508,7 @@ static int assess_supplementary_groups(
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static int assess_restrict_namespaces(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -502,7 +524,7 @@ static int assess_restrict_namespaces(
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static int assess_system_call_architectures(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -513,10 +535,11 @@ static int assess_system_call_architectures(
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assert(ret_badness);
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assert(ret_description);
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if (strv_isempty(info->system_call_architectures)) {
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if (set_isempty(info->system_call_architectures)) {
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b = 10;
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d = strdup("Service may execute system calls with all ABIs");
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} else if (strv_equal(info->system_call_architectures, STRV_MAKE("native"))) {
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} else if (set_contains(info->system_call_architectures, "native") &&
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set_size(info->system_call_architectures) == 1) {
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b = 0;
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d = strdup("Service may execute system calls only with native ABI");
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} else {
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@ -535,7 +558,7 @@ static int assess_system_call_architectures(
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#if HAVE_SECCOMP
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static bool syscall_names_in_filter(Set *s, bool allow_list, const SyscallFilterSet *f, const char **ret_offending_syscall) {
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static bool syscall_names_in_filter(Hashmap *s, bool allow_list, const SyscallFilterSet *f, const char **ret_offending_syscall) {
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const char *syscall;
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NULSTR_FOREACH(syscall, f->value) {
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@ -556,7 +579,7 @@ static bool syscall_names_in_filter(Set *s, bool allow_list, const SyscallFilter
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if (id < 0)
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continue;
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if (set_contains(s, syscall) == allow_list) {
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if (hashmap_contains(s, syscall) == allow_list) {
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log_debug("Offending syscall filter item: %s", syscall);
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if (ret_offending_syscall)
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*ret_offending_syscall = syscall;
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@ -570,7 +593,7 @@ static bool syscall_names_in_filter(Set *s, bool allow_list, const SyscallFilter
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static int assess_system_call_filter(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -587,7 +610,7 @@ static int assess_system_call_filter(
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uint64_t b;
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int r;
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if (!info->system_call_filter_allow_list && set_isempty(info->system_call_filter)) {
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if (!info->system_call_filter_allow_list && hashmap_isempty(info->system_call_filter)) {
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r = free_and_strdup(&d, "Service does not filter system calls");
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b = 10;
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} else {
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@ -635,7 +658,7 @@ static int assess_system_call_filter(
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static int assess_ip_address_allow(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -675,7 +698,7 @@ static int assess_ip_address_allow(
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static int assess_device_allow(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -712,7 +735,7 @@ static int assess_device_allow(
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static int assess_ambient_capabilities(
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const struct security_assessor *a,
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const struct security_info *info,
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const SecurityInfo *info,
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const void *data,
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uint64_t *ret_badness,
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char **ret_description) {
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@ -753,7 +776,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, private_devices),
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.offset = offsetof(SecurityInfo, private_devices),
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},
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{
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.id = "PrivateMounts=",
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@ -763,7 +786,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, private_mounts),
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.offset = offsetof(SecurityInfo, private_mounts),
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},
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{
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.id = "PrivateNetwork=",
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@ -773,7 +796,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 2500,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, private_network),
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.offset = offsetof(SecurityInfo, private_network),
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},
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{
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.id = "PrivateTmp=",
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@ -783,7 +806,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, private_tmp),
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.offset = offsetof(SecurityInfo, private_tmp),
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.default_dependencies_only = true,
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},
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{
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@ -794,7 +817,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, private_users),
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.offset = offsetof(SecurityInfo, private_users),
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},
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{
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.id = "ProtectControlGroups=",
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@ -804,7 +827,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, protect_control_groups),
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.offset = offsetof(SecurityInfo, protect_control_groups),
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},
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{
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.id = "ProtectKernelModules=",
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@ -814,7 +837,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, protect_kernel_modules),
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.offset = offsetof(SecurityInfo, protect_kernel_modules),
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},
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{
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.id = "ProtectKernelTunables=",
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@ -824,7 +847,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, protect_kernel_tunables),
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.offset = offsetof(SecurityInfo, protect_kernel_tunables),
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},
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{
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.id = "ProtectKernelLogs=",
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@ -834,7 +857,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, protect_kernel_logs),
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.offset = offsetof(SecurityInfo, protect_kernel_logs),
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},
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{
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.id = "ProtectClock=",
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@ -844,7 +867,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 1000,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, protect_clock),
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.offset = offsetof(SecurityInfo, protect_clock),
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},
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{
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.id = "ProtectHome=",
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@ -862,7 +885,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 50,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, protect_hostname),
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.offset = offsetof(SecurityInfo, protect_hostname),
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},
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{
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.id = "ProtectSystem=",
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@ -890,7 +913,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 100,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, lock_personality),
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.offset = offsetof(SecurityInfo, lock_personality),
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},
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{
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.id = "MemoryDenyWriteExecute=",
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@ -900,7 +923,7 @@ static const struct security_assessor security_assessor_table[] = {
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.weight = 100,
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.range = 1,
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.assess = assess_bool,
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.offset = offsetof(struct security_info, memory_deny_write_execute),
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.offset = offsetof(SecurityInfo, memory_deny_write_execute),
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},
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{
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.id = "NoNewPrivileges=",
|
||||
|
|
@ -910,7 +933,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 1000,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, no_new_privileges),
|
||||
.offset = offsetof(SecurityInfo, no_new_privileges),
|
||||
},
|
||||
{
|
||||
.id = "CapabilityBoundingSet=~CAP_SYS_ADMIN",
|
||||
|
|
@ -1227,7 +1250,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 100,
|
||||
.range = 1,
|
||||
.assess = assess_remove_ipc,
|
||||
.offset = offsetof(struct security_info, remove_ipc),
|
||||
.offset = offsetof(SecurityInfo, remove_ipc),
|
||||
},
|
||||
{
|
||||
.id = "Delegate=",
|
||||
|
|
@ -1237,7 +1260,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 100,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, delegate),
|
||||
.offset = offsetof(SecurityInfo, delegate),
|
||||
.parameter = true, /* invert! */
|
||||
},
|
||||
{
|
||||
|
|
@ -1248,7 +1271,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 500,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_realtime),
|
||||
.offset = offsetof(SecurityInfo, restrict_realtime),
|
||||
},
|
||||
{
|
||||
.id = "RestrictSUIDSGID=",
|
||||
|
|
@ -1258,7 +1281,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 1000,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_suid_sgid),
|
||||
.offset = offsetof(SecurityInfo, restrict_suid_sgid),
|
||||
},
|
||||
{
|
||||
.id = "RestrictNamespaces=~CLONE_NEWUSER",
|
||||
|
|
@ -1338,7 +1361,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 1500,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_address_family_inet),
|
||||
.offset = offsetof(SecurityInfo, restrict_address_family_inet),
|
||||
},
|
||||
{
|
||||
.id = "RestrictAddressFamilies=~AF_UNIX",
|
||||
|
|
@ -1348,7 +1371,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 25,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_address_family_unix),
|
||||
.offset = offsetof(SecurityInfo, restrict_address_family_unix),
|
||||
},
|
||||
{
|
||||
.id = "RestrictAddressFamilies=~AF_NETLINK",
|
||||
|
|
@ -1358,7 +1381,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 200,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_address_family_netlink),
|
||||
.offset = offsetof(SecurityInfo, restrict_address_family_netlink),
|
||||
},
|
||||
{
|
||||
.id = "RestrictAddressFamilies=~AF_PACKET",
|
||||
|
|
@ -1368,7 +1391,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 1000,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_address_family_packet),
|
||||
.offset = offsetof(SecurityInfo, restrict_address_family_packet),
|
||||
},
|
||||
{
|
||||
.id = "RestrictAddressFamilies=~…",
|
||||
|
|
@ -1378,7 +1401,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
.weight = 1250,
|
||||
.range = 1,
|
||||
.assess = assess_bool,
|
||||
.offset = offsetof(struct security_info, restrict_address_family_other),
|
||||
.offset = offsetof(SecurityInfo, restrict_address_family_other),
|
||||
},
|
||||
{
|
||||
.id = "SystemCallArchitectures=",
|
||||
|
|
@ -1502,7 +1525,7 @@ static const struct security_assessor security_assessor_table[] = {
|
|||
},
|
||||
};
|
||||
|
||||
static int assess(const struct security_info *info, Table *overview_table, AnalyzeSecurityFlags flags) {
|
||||
static int assess(const SecurityInfo *info, Table *overview_table, AnalyzeSecurityFlags flags) {
|
||||
static const struct {
|
||||
uint64_t exposure;
|
||||
const char *name;
|
||||
|
|
@ -1701,6 +1724,56 @@ static int assess(const struct security_info *info, Table *overview_table, Analy
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int property_read_restrict_namespaces(
|
||||
sd_bus *bus,
|
||||
const char *member,
|
||||
sd_bus_message *m,
|
||||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
SecurityInfo *info = userdata;
|
||||
int r;
|
||||
uint64_t namespaces;
|
||||
|
||||
assert(bus);
|
||||
assert(member);
|
||||
assert(m);
|
||||
assert(info);
|
||||
|
||||
r = sd_bus_message_read(m, "t", &namespaces);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
info->restrict_namespaces = (unsigned long long) namespaces;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int property_read_umask(
|
||||
sd_bus *bus,
|
||||
const char *member,
|
||||
sd_bus_message *m,
|
||||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
SecurityInfo *info = userdata;
|
||||
int r;
|
||||
uint32_t umask;
|
||||
|
||||
assert(bus);
|
||||
assert(member);
|
||||
assert(m);
|
||||
assert(info);
|
||||
|
||||
r = sd_bus_message_read(m, "u", &umask);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
info->_umask = (mode_t) umask;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int property_read_restrict_address_families(
|
||||
sd_bus *bus,
|
||||
const char *member,
|
||||
|
|
@ -1708,7 +1781,7 @@ static int property_read_restrict_address_families(
|
|||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
struct security_info *info = userdata;
|
||||
SecurityInfo *info = userdata;
|
||||
int allow_list, r;
|
||||
|
||||
assert(bus);
|
||||
|
|
@ -1761,6 +1834,42 @@ static int property_read_restrict_address_families(
|
|||
return sd_bus_message_exit_container(m);
|
||||
}
|
||||
|
||||
static int property_read_syscall_archs(
|
||||
sd_bus *bus,
|
||||
const char *member,
|
||||
sd_bus_message *m,
|
||||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
SecurityInfo *info = userdata;
|
||||
int r;
|
||||
|
||||
assert(bus);
|
||||
assert(member);
|
||||
assert(m);
|
||||
assert(info);
|
||||
|
||||
r = sd_bus_message_enter_container(m, 'a', "s");
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
for (;;) {
|
||||
const char *name;
|
||||
|
||||
r = sd_bus_message_read(m, "s", &name);
|
||||
if (r < 0)
|
||||
return r;
|
||||
if (r == 0)
|
||||
break;
|
||||
|
||||
r = set_put_strdup(&info->system_call_architectures, name);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
|
||||
return sd_bus_message_exit_container(m);
|
||||
}
|
||||
|
||||
static int property_read_system_call_filter(
|
||||
sd_bus *bus,
|
||||
const char *member,
|
||||
|
|
@ -1768,7 +1877,7 @@ static int property_read_system_call_filter(
|
|||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
struct security_info *info = userdata;
|
||||
SecurityInfo *info = userdata;
|
||||
int allow_list, r;
|
||||
|
||||
assert(bus);
|
||||
|
|
@ -1798,7 +1907,9 @@ static int property_read_system_call_filter(
|
|||
if (r == 0)
|
||||
break;
|
||||
|
||||
r = set_put_strdup(&info->system_call_filter, name);
|
||||
/* The actual ExecContext stores the system call id as the map value, which we don't
|
||||
* need. So we assign NULL to all values here. */
|
||||
r = hashmap_put_strdup(&info->system_call_filter, name, NULL);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
|
|
@ -1817,7 +1928,7 @@ static int property_read_ip_address_allow(
|
|||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
struct security_info *info = userdata;
|
||||
SecurityInfo *info = userdata;
|
||||
bool deny_ipv4 = false, deny_ipv6 = false;
|
||||
int r;
|
||||
|
||||
|
|
@ -1895,7 +2006,7 @@ static int property_read_ip_filters(
|
|||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
struct security_info *info = userdata;
|
||||
SecurityInfo *info = userdata;
|
||||
_cleanup_(strv_freep) char **l = NULL;
|
||||
int r;
|
||||
|
||||
|
|
@ -1922,7 +2033,7 @@ static int property_read_device_allow(
|
|||
sd_bus_error *error,
|
||||
void *userdata) {
|
||||
|
||||
struct security_info *info = userdata;
|
||||
SecurityInfo *info = userdata;
|
||||
size_t n = 0;
|
||||
int r;
|
||||
|
||||
|
|
@ -1951,56 +2062,56 @@ static int property_read_device_allow(
|
|||
return sd_bus_message_exit_container(m);
|
||||
}
|
||||
|
||||
static int acquire_security_info(sd_bus *bus, const char *name, struct security_info *info, AnalyzeSecurityFlags flags) {
|
||||
static int acquire_security_info(sd_bus *bus, const char *name, SecurityInfo *info, AnalyzeSecurityFlags flags) {
|
||||
|
||||
static const struct bus_properties_map security_map[] = {
|
||||
{ "AmbientCapabilities", "t", NULL, offsetof(struct security_info, ambient_capabilities) },
|
||||
{ "CapabilityBoundingSet", "t", NULL, offsetof(struct security_info, capability_bounding_set) },
|
||||
{ "DefaultDependencies", "b", NULL, offsetof(struct security_info, default_dependencies) },
|
||||
{ "Delegate", "b", NULL, offsetof(struct security_info, delegate) },
|
||||
{ "DeviceAllow", "a(ss)", property_read_device_allow, 0 },
|
||||
{ "DevicePolicy", "s", NULL, offsetof(struct security_info, device_policy) },
|
||||
{ "DynamicUser", "b", NULL, offsetof(struct security_info, dynamic_user) },
|
||||
{ "FragmentPath", "s", NULL, offsetof(struct security_info, fragment_path) },
|
||||
{ "IPAddressAllow", "a(iayu)", property_read_ip_address_allow, 0 },
|
||||
{ "IPAddressDeny", "a(iayu)", property_read_ip_address_allow, 0 },
|
||||
{ "IPIngressFilterPath", "as", property_read_ip_filters, 0 },
|
||||
{ "IPEgressFilterPath", "as", property_read_ip_filters, 0 },
|
||||
{ "Id", "s", NULL, offsetof(struct security_info, id) },
|
||||
{ "KeyringMode", "s", NULL, offsetof(struct security_info, keyring_mode) },
|
||||
{ "ProtectProc", "s", NULL, offsetof(struct security_info, protect_proc) },
|
||||
{ "ProcSubset", "s", NULL, offsetof(struct security_info, proc_subset) },
|
||||
{ "LoadState", "s", NULL, offsetof(struct security_info, load_state) },
|
||||
{ "LockPersonality", "b", NULL, offsetof(struct security_info, lock_personality) },
|
||||
{ "MemoryDenyWriteExecute", "b", NULL, offsetof(struct security_info, memory_deny_write_execute) },
|
||||
{ "NoNewPrivileges", "b", NULL, offsetof(struct security_info, no_new_privileges) },
|
||||
{ "NotifyAccess", "s", NULL, offsetof(struct security_info, notify_access) },
|
||||
{ "PrivateDevices", "b", NULL, offsetof(struct security_info, private_devices) },
|
||||
{ "PrivateMounts", "b", NULL, offsetof(struct security_info, private_mounts) },
|
||||
{ "PrivateNetwork", "b", NULL, offsetof(struct security_info, private_network) },
|
||||
{ "PrivateTmp", "b", NULL, offsetof(struct security_info, private_tmp) },
|
||||
{ "PrivateUsers", "b", NULL, offsetof(struct security_info, private_users) },
|
||||
{ "ProtectControlGroups", "b", NULL, offsetof(struct security_info, protect_control_groups) },
|
||||
{ "ProtectHome", "s", NULL, offsetof(struct security_info, protect_home) },
|
||||
{ "ProtectHostname", "b", NULL, offsetof(struct security_info, protect_hostname) },
|
||||
{ "ProtectKernelModules", "b", NULL, offsetof(struct security_info, protect_kernel_modules) },
|
||||
{ "ProtectKernelTunables", "b", NULL, offsetof(struct security_info, protect_kernel_tunables) },
|
||||
{ "ProtectKernelLogs", "b", NULL, offsetof(struct security_info, protect_kernel_logs) },
|
||||
{ "ProtectClock", "b", NULL, offsetof(struct security_info, protect_clock) },
|
||||
{ "ProtectSystem", "s", NULL, offsetof(struct security_info, protect_system) },
|
||||
{ "RemoveIPC", "b", NULL, offsetof(struct security_info, remove_ipc) },
|
||||
{ "RestrictAddressFamilies", "(bas)", property_read_restrict_address_families, 0 },
|
||||
{ "RestrictNamespaces", "t", NULL, offsetof(struct security_info, restrict_namespaces) },
|
||||
{ "RestrictRealtime", "b", NULL, offsetof(struct security_info, restrict_realtime) },
|
||||
{ "RestrictSUIDSGID", "b", NULL, offsetof(struct security_info, restrict_suid_sgid) },
|
||||
{ "RootDirectory", "s", NULL, offsetof(struct security_info, root_directory) },
|
||||
{ "RootImage", "s", NULL, offsetof(struct security_info, root_image) },
|
||||
{ "SupplementaryGroups", "as", NULL, offsetof(struct security_info, supplementary_groups) },
|
||||
{ "SystemCallArchitectures", "as", NULL, offsetof(struct security_info, system_call_architectures) },
|
||||
{ "SystemCallFilter", "(as)", property_read_system_call_filter, 0 },
|
||||
{ "Type", "s", NULL, offsetof(struct security_info, type) },
|
||||
{ "UMask", "u", NULL, offsetof(struct security_info, _umask) },
|
||||
{ "User", "s", NULL, offsetof(struct security_info, user) },
|
||||
{ "AmbientCapabilities", "t", NULL, offsetof(SecurityInfo, ambient_capabilities) },
|
||||
{ "CapabilityBoundingSet", "t", NULL, offsetof(SecurityInfo, capability_bounding_set) },
|
||||
{ "DefaultDependencies", "b", NULL, offsetof(SecurityInfo, default_dependencies) },
|
||||
{ "Delegate", "b", NULL, offsetof(SecurityInfo, delegate) },
|
||||
{ "DeviceAllow", "a(ss)", property_read_device_allow, 0 },
|
||||
{ "DevicePolicy", "s", NULL, offsetof(SecurityInfo, device_policy) },
|
||||
{ "DynamicUser", "b", NULL, offsetof(SecurityInfo, dynamic_user) },
|
||||
{ "FragmentPath", "s", NULL, offsetof(SecurityInfo, fragment_path) },
|
||||
{ "IPAddressAllow", "a(iayu)", property_read_ip_address_allow, 0 },
|
||||
{ "IPAddressDeny", "a(iayu)", property_read_ip_address_allow, 0 },
|
||||
{ "IPIngressFilterPath", "as", property_read_ip_filters, 0 },
|
||||
{ "IPEgressFilterPath", "as", property_read_ip_filters, 0 },
|
||||
{ "Id", "s", NULL, offsetof(SecurityInfo, id) },
|
||||
{ "KeyringMode", "s", NULL, offsetof(SecurityInfo, keyring_mode) },
|
||||
{ "ProtectProc", "s", NULL, offsetof(SecurityInfo, protect_proc) },
|
||||
{ "ProcSubset", "s", NULL, offsetof(SecurityInfo, proc_subset) },
|
||||
{ "LoadState", "s", NULL, offsetof(SecurityInfo, load_state) },
|
||||
{ "LockPersonality", "b", NULL, offsetof(SecurityInfo, lock_personality) },
|
||||
{ "MemoryDenyWriteExecute", "b", NULL, offsetof(SecurityInfo, memory_deny_write_execute) },
|
||||
{ "NoNewPrivileges", "b", NULL, offsetof(SecurityInfo, no_new_privileges) },
|
||||
{ "NotifyAccess", "s", NULL, offsetof(SecurityInfo, notify_access) },
|
||||
{ "PrivateDevices", "b", NULL, offsetof(SecurityInfo, private_devices) },
|
||||
{ "PrivateMounts", "b", NULL, offsetof(SecurityInfo, private_mounts) },
|
||||
{ "PrivateNetwork", "b", NULL, offsetof(SecurityInfo, private_network) },
|
||||
{ "PrivateTmp", "b", NULL, offsetof(SecurityInfo, private_tmp) },
|
||||
{ "PrivateUsers", "b", NULL, offsetof(SecurityInfo, private_users) },
|
||||
{ "ProtectControlGroups", "b", NULL, offsetof(SecurityInfo, protect_control_groups) },
|
||||
{ "ProtectHome", "s", NULL, offsetof(SecurityInfo, protect_home) },
|
||||
{ "ProtectHostname", "b", NULL, offsetof(SecurityInfo, protect_hostname) },
|
||||
{ "ProtectKernelModules", "b", NULL, offsetof(SecurityInfo, protect_kernel_modules) },
|
||||
{ "ProtectKernelTunables", "b", NULL, offsetof(SecurityInfo, protect_kernel_tunables) },
|
||||
{ "ProtectKernelLogs", "b", NULL, offsetof(SecurityInfo, protect_kernel_logs) },
|
||||
{ "ProtectClock", "b", NULL, offsetof(SecurityInfo, protect_clock) },
|
||||
{ "ProtectSystem", "s", NULL, offsetof(SecurityInfo, protect_system) },
|
||||
{ "RemoveIPC", "b", NULL, offsetof(SecurityInfo, remove_ipc) },
|
||||
{ "RestrictAddressFamilies", "(bas)", property_read_restrict_address_families, 0 },
|
||||
{ "RestrictNamespaces", "t", property_read_restrict_namespaces, 0 },
|
||||
{ "RestrictRealtime", "b", NULL, offsetof(SecurityInfo, restrict_realtime) },
|
||||
{ "RestrictSUIDSGID", "b", NULL, offsetof(SecurityInfo, restrict_suid_sgid) },
|
||||
{ "RootDirectory", "s", NULL, offsetof(SecurityInfo, root_directory) },
|
||||
{ "RootImage", "s", NULL, offsetof(SecurityInfo, root_image) },
|
||||
{ "SupplementaryGroups", "as", NULL, offsetof(SecurityInfo, supplementary_groups) },
|
||||
{ "SystemCallArchitectures", "as", property_read_syscall_archs, 0 },
|
||||
{ "SystemCallFilter", "(as)", property_read_system_call_filter, 0 },
|
||||
{ "Type", "s", NULL, offsetof(SecurityInfo, type) },
|
||||
{ "UMask", "u", property_read_umask, 0 },
|
||||
{ "User", "s", NULL, offsetof(SecurityInfo, user) },
|
||||
{}
|
||||
};
|
||||
|
||||
|
|
@ -2076,30 +2187,207 @@ static int acquire_security_info(sd_bus *bus, const char *name, struct security_
|
|||
}
|
||||
|
||||
static int analyze_security_one(sd_bus *bus, const char *name, Table *overview_table, AnalyzeSecurityFlags flags) {
|
||||
_cleanup_(security_info_free) struct security_info info = {
|
||||
.default_dependencies = true,
|
||||
.capability_bounding_set = UINT64_MAX,
|
||||
.restrict_namespaces = UINT64_MAX,
|
||||
._umask = 0002,
|
||||
};
|
||||
_cleanup_(security_info_freep) SecurityInfo *info = security_info_new();
|
||||
if (!info)
|
||||
return log_oom();
|
||||
|
||||
int r;
|
||||
|
||||
assert(bus);
|
||||
assert(name);
|
||||
|
||||
r = acquire_security_info(bus, name, &info, flags);
|
||||
r = acquire_security_info(bus, name, info, flags);
|
||||
if (r == -EMEDIUMTYPE) /* Ignore this one because not loaded or Type is oneshot */
|
||||
return 0;
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
r = assess(&info, overview_table, flags);
|
||||
r = assess(info, overview_table, flags);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Refactoring SecurityInfo so that it can make use of existing struct variables instead of reading from dbus */
|
||||
static int get_security_info(Unit *u, ExecContext *c, CGroupContext *g, SecurityInfo **ret_info) {
|
||||
assert(ret_info);
|
||||
|
||||
_cleanup_(security_info_freep) SecurityInfo *info = security_info_new();
|
||||
if (!info)
|
||||
return log_oom();
|
||||
|
||||
if (u) {
|
||||
if (u->id) {
|
||||
info->id = strdup(u->id);
|
||||
if (!info->id)
|
||||
return log_oom();
|
||||
}
|
||||
if (unit_type_to_string(u->type)) {
|
||||
info->type = strdup(unit_type_to_string(u->type));
|
||||
if (!info->type)
|
||||
return log_oom();
|
||||
}
|
||||
if (unit_load_state_to_string(u->load_state)) {
|
||||
info->load_state = strdup(unit_load_state_to_string(u->load_state));
|
||||
if (!info->load_state)
|
||||
return log_oom();
|
||||
}
|
||||
if (u->fragment_path) {
|
||||
info->fragment_path = strdup(u->fragment_path);
|
||||
if (!info->fragment_path)
|
||||
return log_oom();
|
||||
}
|
||||
info->default_dependencies = u->default_dependencies;
|
||||
if (u->type == UNIT_SERVICE && notify_access_to_string(SERVICE(u)->notify_access)) {
|
||||
info->notify_access = strdup(notify_access_to_string(SERVICE(u)->notify_access));
|
||||
if (!info->notify_access)
|
||||
return log_oom();
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
info->ambient_capabilities = c->capability_ambient_set;
|
||||
info->capability_bounding_set = c->capability_bounding_set;
|
||||
if (c->user) {
|
||||
info->user = strdup(c->user);
|
||||
if (!info->user)
|
||||
return log_oom();
|
||||
}
|
||||
if (c->supplementary_groups) {
|
||||
info->supplementary_groups = strv_copy(c->supplementary_groups);
|
||||
if (!info->supplementary_groups)
|
||||
return log_oom();
|
||||
}
|
||||
info->dynamic_user = c->dynamic_user;
|
||||
if (exec_keyring_mode_to_string(c->keyring_mode)) {
|
||||
info->keyring_mode = strdup(exec_keyring_mode_to_string(c->keyring_mode));
|
||||
if (!info->keyring_mode)
|
||||
return log_oom();
|
||||
}
|
||||
if (protect_proc_to_string(c->protect_proc)) {
|
||||
info->protect_proc = strdup(protect_proc_to_string(c->protect_proc));
|
||||
if (!info->protect_proc)
|
||||
return log_oom();
|
||||
}
|
||||
if (proc_subset_to_string(c->proc_subset)) {
|
||||
info->proc_subset = strdup(proc_subset_to_string(c->proc_subset));
|
||||
if (!info->proc_subset)
|
||||
return log_oom();
|
||||
}
|
||||
info->lock_personality = c->lock_personality;
|
||||
info->memory_deny_write_execute = c->memory_deny_write_execute;
|
||||
info->no_new_privileges = c->no_new_privileges;
|
||||
info->protect_hostname = c->protect_hostname;
|
||||
info->private_devices = c->private_devices;
|
||||
info->private_mounts = c->private_mounts;
|
||||
info->private_network = c->private_network;
|
||||
info->private_tmp = c->private_tmp;
|
||||
info->private_users = c->private_users;
|
||||
info->protect_control_groups = c->protect_control_groups;
|
||||
info->protect_kernel_modules = c->protect_kernel_modules;
|
||||
info->protect_kernel_tunables = c->protect_kernel_tunables;
|
||||
info->protect_kernel_logs = c->protect_kernel_logs;
|
||||
info->protect_clock = c->protect_clock;
|
||||
if (protect_home_to_string(c->protect_home)) {
|
||||
info->protect_home = strdup(protect_home_to_string(c->protect_home));
|
||||
if (!info->protect_home)
|
||||
return log_oom();
|
||||
}
|
||||
if (protect_system_to_string(c->protect_system)) {
|
||||
info->protect_system = strdup(protect_system_to_string(c->protect_system));
|
||||
if (!info->protect_system)
|
||||
return log_oom();
|
||||
}
|
||||
info->remove_ipc = c->remove_ipc;
|
||||
info->restrict_address_family_inet =
|
||||
info->restrict_address_family_unix =
|
||||
info->restrict_address_family_netlink =
|
||||
info->restrict_address_family_packet =
|
||||
info->restrict_address_family_other =
|
||||
c->address_families_allow_list;
|
||||
|
||||
void *key;
|
||||
SET_FOREACH(key, c->address_families) {
|
||||
int family = PTR_TO_INT(key);
|
||||
if (family == 0)
|
||||
continue;
|
||||
if (IN_SET(family, AF_INET, AF_INET6))
|
||||
info->restrict_address_family_inet = !c->address_families_allow_list;
|
||||
else if (family == AF_UNIX)
|
||||
info->restrict_address_family_unix = !c->address_families_allow_list;
|
||||
else if (family == AF_NETLINK)
|
||||
info->restrict_address_family_netlink = !c->address_families_allow_list;
|
||||
else if (family == AF_PACKET)
|
||||
info->restrict_address_family_packet = !c->address_families_allow_list;
|
||||
else
|
||||
info->restrict_address_family_other = !c->address_families_allow_list;
|
||||
}
|
||||
|
||||
info->restrict_namespaces = c->restrict_namespaces;
|
||||
info->restrict_realtime = c->restrict_realtime;
|
||||
info->restrict_suid_sgid = c->restrict_suid_sgid;
|
||||
if (c->root_directory) {
|
||||
info->root_directory = strdup(c->root_directory);
|
||||
if (!info->root_directory)
|
||||
return log_oom();
|
||||
}
|
||||
if (c->root_image) {
|
||||
info->root_image = strdup(c->root_image);
|
||||
if (!info->root_image)
|
||||
return log_oom();
|
||||
}
|
||||
info->_umask = c->umask;
|
||||
if (c->syscall_archs) {
|
||||
info->system_call_architectures = set_copy(c->syscall_archs);
|
||||
if (!info->system_call_architectures)
|
||||
return log_oom();
|
||||
}
|
||||
info->system_call_filter_allow_list = c->syscall_allow_list;
|
||||
if (c->syscall_filter) {
|
||||
info->system_call_filter = hashmap_copy(c->syscall_filter);
|
||||
if (!info->system_call_filter)
|
||||
return log_oom();
|
||||
}
|
||||
}
|
||||
|
||||
if (g) {
|
||||
info->delegate = g->delegate;
|
||||
if (cgroup_device_policy_to_string(g->device_policy)) {
|
||||
info->device_policy = strdup(cgroup_device_policy_to_string(g->device_policy));
|
||||
if (!info->device_policy)
|
||||
return log_oom();
|
||||
}
|
||||
|
||||
IPAddressAccessItem *i;
|
||||
bool deny_ipv4 = false, deny_ipv6 = false;
|
||||
|
||||
LIST_FOREACH(items, i, g->ip_address_deny) {
|
||||
if (i->family == AF_INET && i->prefixlen == 0)
|
||||
deny_ipv4 = true;
|
||||
else if (i->family == AF_INET6 && i->prefixlen == 0)
|
||||
deny_ipv6 = true;
|
||||
}
|
||||
info->ip_address_deny_all = deny_ipv4 && deny_ipv6;
|
||||
|
||||
info->ip_address_allow_localhost = info->ip_address_allow_other = false;
|
||||
LIST_FOREACH(items, i, g->ip_address_allow) {
|
||||
if (in_addr_is_localhost(i->family, &i->address))
|
||||
info->ip_address_allow_localhost = true;
|
||||
else
|
||||
info->ip_address_allow_other = true;
|
||||
}
|
||||
|
||||
info->ip_filters_custom_ingress = !strv_isempty(g->ip_filters_ingress);
|
||||
info->ip_filters_custom_egress = !strv_isempty(g->ip_filters_egress);
|
||||
info->device_allow_non_empty = !LIST_IS_EMPTY(g->device_allow);
|
||||
}
|
||||
|
||||
*ret_info = TAKE_PTR(info);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int analyze_security(sd_bus *bus, char **units, AnalyzeSecurityFlags flags) {
|
||||
_cleanup_(table_unrefp) Table *overview_table = NULL;
|
||||
int ret = 0, r;
|
||||
|
|
|
|||
Loading…
Reference in a new issue