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Add blacklist support to rlogind

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Reviewed by:	rpaulo
Approved by:	rpaulo
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D6593
This commit is contained in:
Kurt Lidl 2016-06-05 01:42:58 +00:00
parent 79d0939e3c
commit aed8f11013
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=301417
2 changed files with 27 additions and 3 deletions
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6
libexec/rlogind/Makefile
View file

@ -14,4 +14,10 @@ WARNS?= 2
CFLAGS+= -DINET6
.endif
.if ${MK_BLACKLIST_SUPPORT} != "no"
CFLAGS+= -DUSE_BLACKLIST -I${SRCTOP}/contrib/blacklist/include
LIBADD+= blacklist
LDFLAGS+=-L${LIBBLACKLISTDIR}
.endif
.include <bsd.prog.mk>

24
libexec/rlogind/rlogind.c
View file

@ -83,7 +83,9 @@ __FBSDID("$FreeBSD$");
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef USE_BLACKLIST
#include <blacklist.h>
#endif
#ifndef TIOCPKT_WINDOW
#define TIOCPKT_WINDOW 0x80
@ -229,6 +231,9 @@ doit(int f, union sockunion *fromp)
/* error check ? */
syslog(LOG_NOTICE, "Connection from %s on illegal port",
nameinfo);
#ifdef USE_BLACKLIST
blacklist(1, STDIN_FILENO, "illegal port");
#endif
fatal(f, "Permission denied", 0);
}
#ifdef IP_OPTIONS
@ -252,6 +257,9 @@ doit(int f, union sockunion *fromp)
"Connection refused from %s with IP option %s",
inet_ntoa(fromp->su_sin.sin_addr),
c == IPOPT_LSRR ? "LSRR" : "SSRR");
#ifdef USE_BLACKLIST
blacklist(1, STDIN_FILENO, "source routing present");
#endif
exit(1);
}
if (c == IPOPT_EOL)
@ -281,11 +289,17 @@ doit(int f, union sockunion *fromp)
if (f > 2) /* f should always be 0, but... */
(void) close(f);
setup_term(0);
if (*lusername=='-') {
if (*lusername=='-') {
syslog(LOG_ERR, "tried to pass user \"%s\" to login",
lusername);
#ifdef USE_BLACKLIST
blacklist(1, STDIN_FILENO, "invalid user");
#endif
fatal(STDERR_FILENO, "invalid user", 0);
}
#ifdef USE_BLACKLIST
blacklist(0, STDIN_FILENO, "success");
#endif
if (authenticated) {
execl(_PATH_LOGIN, "login", "-p",
"-h", hostname, "-f", lusername, (char *)NULL);
@ -508,8 +522,12 @@ getstr(char *buf, int cnt, char *errmsg)
do {
if (read(STDIN_FILENO, &c, 1) != 1)
exit(1);
if (--cnt < 0)
if (--cnt < 0) {
#ifdef USE_BLACKLIST
blacklist(1, STDIN_FILENO, "buffer overflow");
#endif
fatal(STDOUT_FILENO, errmsg, 0);
}
*buf++ = c;
} while (c != 0);
}