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sysctls which should be restricted when securelevel is raised should also
be restricted when veriexec is enforced. Add mpo_system_check_sysctl method to mac_veriexec which does this. Obtained from: Juniper Networks, Inc. MFC after: 1 week
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parent
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=347936
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@ -1,7 +1,7 @@
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/*
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* $FreeBSD$
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*
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* Copyright (c) 2011, 2012, 2013, 2015, 2016, Juniper Networks, Inc.
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* Copyright (c) 2011, 2012, 2013, 2015, 2016, 2019 Juniper Networks, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -424,6 +424,23 @@ mac_veriexec_priv_check(struct ucred *cred, int priv)
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return (0);
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}
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static int
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mac_veriexec_sysctl_check(struct ucred *cred, struct sysctl_oid *oidp,
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void *arg1, int arg2, struct sysctl_req *req)
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{
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struct sysctl_oid *oid;
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/* If we are not enforcing veriexec, nothing for us to check */
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if ((mac_veriexec_state & VERIEXEC_STATE_ENFORCE) == 0)
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return (0);
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oid = oidp;
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if (oid->oid_kind & CTLFLAG_SECURE) {
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return (EPERM); /* XXX call mac_veriexec_priv_check? */
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}
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return 0;
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}
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/**
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* @internal
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* @brief A program is being executed and needs to be validated.
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@ -700,12 +717,13 @@ mac_veriexec_syscall(struct thread *td, int call, void *arg)
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static struct mac_policy_ops mac_veriexec_ops =
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{
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.mpo_init = mac_veriexec_init,
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.mpo_syscall = mac_veriexec_syscall,
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.mpo_kld_check_load = mac_veriexec_kld_check_load,
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.mpo_mount_destroy_label = mac_veriexec_mount_destroy_label,
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.mpo_mount_init_label = mac_veriexec_mount_init_label,
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.mpo_priv_check = mac_veriexec_priv_check,
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.mpo_proc_check_debug = mac_veriexec_proc_check_debug,
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.mpo_syscall = mac_veriexec_syscall,
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.mpo_system_check_sysctl = mac_veriexec_sysctl_check,
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.mpo_vnode_check_exec = mac_veriexec_vnode_check_exec,
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.mpo_vnode_check_open = mac_veriexec_vnode_check_open,
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.mpo_vnode_check_setmode = mac_veriexec_vnode_check_setmode,
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