155 lines
5.3 KiB
Diff
155 lines
5.3 KiB
Diff
diff -up at-3.1.14/config.h.in.selinux at-3.1.14/config.h.in
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--- at-3.1.14/config.h.in.selinux 2013-09-26 15:06:55.177049852 +0200
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+++ at-3.1.14/config.h.in 2013-09-26 15:06:55.180049850 +0200
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@@ -71,6 +71,9 @@
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/* Define if you are building with_pam */
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#undef WITH_PAM
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+/* Define if you are building with_selinux */
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+#undef WITH_SELINUX
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+
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/* Define to 1 if you have the `pstat_getdynamic' function. */
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#undef HAVE_PSTAT_GETDYNAMIC
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diff -up at-3.1.14/configure.ac.selinux at-3.1.14/configure.ac
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--- at-3.1.14/configure.ac.selinux 2013-09-26 15:06:55.178049851 +0200
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+++ at-3.1.14/configure.ac 2013-09-26 15:06:55.180049850 +0200
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@@ -246,6 +246,14 @@ AC_DEFINE(WITH_PAM),
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AC_CHECK_LIB(pam, pam_start, PAMLIB='-lpam -lpam_misc')
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AC_SUBST(PAMLIB)
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+AC_ARG_WITH(selinux,
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+[ --with-selinux Define to run with selinux],
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+AC_DEFINE(WITH_SELINUX),
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+)
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+AC_CHECK_LIB(selinux, is_selinux_enabled, SELINUXLIB=-lselinux)
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+AC_SUBST(SELINUXLIB)
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+AC_SUBST(WITH_SELINUX)
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+
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AC_MSG_CHECKING(groupname to run under)
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AC_ARG_WITH(daemon_groupname,
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[ --with-daemon_groupname=DAEMON_GROUPNAME Groupname to run under (default daemon) ],
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diff -up at-3.1.14/Makefile.in.selinux at-3.1.14/Makefile.in
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--- at-3.1.14/Makefile.in.selinux 2013-09-26 15:06:55.175049853 +0200
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+++ at-3.1.14/Makefile.in 2013-09-26 15:06:55.180049850 +0200
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@@ -40,6 +40,7 @@ LIBS = @LIBS@
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LIBOBJS = @LIBOBJS@
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INSTALL = @INSTALL@
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PAMLIB = @PAMLIB@
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+SELINUXLIB = @SELINUXLIB@
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CLONES = atq atrm
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ATOBJECTS = at.o panic.o perm.o posixtm.o y.tab.o lex.yy.o
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diff -up at-3.1.14/atd.c.selinux2 at-3.1.14/atd.c
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--- at-3.1.14/atd.c.selinux2 2013-12-04 11:27:28.729005384 +0100
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+++ at-3.1.14/atd.c 2013-12-04 11:30:17.709091150 +0100
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@@ -83,6 +83,14 @@
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#include "getloadavg.h"
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#endif
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+#ifdef WITH_SELINUX
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+#include <selinux/selinux.h>
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+#include <selinux/get_context_list.h>
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+int selinux_enabled=0;
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+#include <selinux/flask.h>
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+#include <selinux/av_permissions.h>
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+#endif
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+
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#ifndef LOG_ATD
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#define LOG_ATD LOG_DAEMON
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#endif
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@@ -191,6 +199,68 @@ myfork()
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#define fork myfork
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#endif
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+#ifdef WITH_SELINUX
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+static int set_selinux_context(const char *name, const char *filename) {
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+ security_context_t user_context=NULL;
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+ security_context_t file_context=NULL;
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+ struct av_decision avd;
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+ int retval=-1;
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+ char *seuser=NULL;
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+ char *level=NULL;
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+
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+ if (getseuserbyname(name, &seuser, &level) == 0) {
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+ retval=get_default_context_with_level(seuser, level, NULL, &user_context);
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+ free(seuser);
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+ free(level);
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+ if (retval) {
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+ if (security_getenforce()==1) {
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+ perr("execle: couldn't get security context for user %s\n", name);
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+ } else {
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+ syslog(LOG_ERR, "execle: couldn't get security context for user %s\n", name);
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+ return -1;
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+ }
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+ }
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+ }
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+
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+ /*
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+ * Since crontab files are not directly executed,
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+ * crond must ensure that the crontab file has
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+ * a context that is appropriate for the context of
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+ * the user cron job. It performs an entrypoint
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+ * permission check for this purpose.
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+ */
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+ if (fgetfilecon(STDIN_FILENO, &file_context) < 0)
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+ perr("fgetfilecon FAILED %s", filename);
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+
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+ retval = security_compute_av(user_context,
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+ file_context,
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+ SECCLASS_FILE,
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+ FILE__ENTRYPOINT,
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+ &avd);
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+ freecon(file_context);
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+ if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
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+ if (security_getenforce()==1) {
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+ perr("Not allowed to set exec context to %s for user %s\n", user_context,name);
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+ } else {
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+ syslog(LOG_ERR, "Not allowed to set exec context to %s for user %s\n", user_context,name);
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+ retval = -1;
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+ goto err;
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+ }
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+ }
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+ if (setexeccon(user_context) < 0) {
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+ if (security_getenforce()==1) {
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+ perr("Could not set exec context to %s for user %s\n", user_context,name);
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+ retval = -1;
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+ } else {
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+ syslog(LOG_ERR, "Could not set exec context to %s for user %s\n", user_context,name);
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+ }
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+ }
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+ err:
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+ freecon(user_context);
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+ return 0;
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+}
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+#endif
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+
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static void
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run_file(const char *filename, uid_t uid, gid_t gid)
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{
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@@ -419,6 +489,13 @@ run_file(const char *filename, uid_t uid
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nice((tolower((int) queue) - 'a' + 1) * 2);
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+#ifdef WITH_SELINUX
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+ if (selinux_enabled > 0) {
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+ if (set_selinux_context(pentry->pw_name, filename) < 0)
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+ perr("SELinux Failed to set context\n");
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+ }
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+#endif
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+
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if (initgroups(pentry->pw_name, pentry->pw_gid))
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perr("Cannot initialize the supplementary group access list");
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@@ -712,6 +789,10 @@ main(int argc, char *argv[])
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struct passwd *pwe;
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struct group *ge;
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+#ifdef WITH_SELINUX
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+ selinux_enabled=is_selinux_enabled();
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+#endif
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+
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/* We don't need root privileges all the time; running under uid and gid
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* daemon is fine.
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*/
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