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--- vixie-cron-3.0.1/Makefile.selinux 2003-05-20 14:52:06.000000000 -0400
+++ vixie-cron-3.0.1/Makefile 2003-05-20 14:52:21.000000000 -0400
@@ -71,7 +71,8 @@ LINTFLAGS = -hbxa $(INCLUDE) $(COMPAT) $
#<<want to use a nonstandard CC?>>
#CC = vcc
#<<manifest defines>>
-DEFS = -s
+DEFS = -s -DWITH_SELINUX
+LIBS += -lselinux
#(SGI IRIX systems need this)
#DEFS = -D_BSD_SIGNALS -Dconst=
#<<the name of the BSD-like install program>>
--- vixie-cron-3.0.1/database.c.selinux 2003-05-20 14:52:56.000000000 -0400
+++ vixie-cron-3.0.1/database.c 2003-05-23 13:27:24.898020960 -0400
@@ -28,6 +28,15 @@ static char rcsid[] = "$Id: database.c,v
#include <sys/stat.h>
#include <sys/file.h>
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#include <selinux/flask.h>
+#include <selinux/av_permissions.h>
+#define SYSUSERNAME "system_u"
+#else
+#define SYSUSERNAME "*system*"
+#endif
+
#define TMAX(a,b) ((a)>(b)?(a):(b))
@@ -94,7 +103,7 @@ load_database(old_db)
new_db.head = new_db.tail = NULL;
if (syscron_stat.st_mtime) {
- process_crontab("root", "*system*",
+ process_crontab("root", SYSUSERNAME,
SYSCRONTAB, &syscron_stat,
&new_db, old_db);
}
@@ -136,7 +145,7 @@ load_database(old_db)
snprintf(tabname, MAXNAMLEN+1, "/etc/cron.d/%s", fname);
- process_crontab("root", "*system*", tabname,
+ process_crontab("root", SYSUSERNAME, tabname,
&crond_stat, &new_db, old_db);
}
closedir(dir);
@@ -253,7 +262,7 @@ process_crontab(uname, fname, tabname, s
int crontab_fd = OK - 1;
user *u;
- if (strcmp(fname, "*system*") && !(pw = getpwnam(uname))) {
+ if (strcmp(fname, SYSUSERNAME) && !(pw = getpwnam(uname))) {
/* file doesn't have a user in passwd file.
*/
log_it(fname, getpid(), "ORPHAN", "no passwd entry");
@@ -297,6 +306,43 @@ process_crontab(uname, fname, tabname, s
free_user(u);
log_it(fname, getpid(), "RELOAD", tabname);
}
+#ifdef WITH_SELINUX
+ if (is_selinux_enabled()) {
+ security_context_t file_context=NULL;
+ security_context_t user_context=NULL;
+ struct av_decision avd;
+ int retval=0;
+
+ if (fgetfilecon(crontab_fd, &file_context) < OK) {
+ log_it(fname, getpid(), "getfilecon FAILED", tabname);
+ goto next_crontab;
+ }
+
+ /*
+ * Since crontab files are not directly executed,
+ * crond must ensure that the crontab file has
+ * a context that is appropriate for the context of
+ * the user cron job. It performs an entrypoint
+ * permission check for this purpose.
+ */
+ if (get_default_context(fname, NULL, &user_context)) {
+ log_it(fname, getpid(), "NO CONTEXT", tabname);
+ freecon(file_context);
+ goto next_crontab;
+ }
+ retval = security_compute_av(user_context,
+ file_context,
+ SECCLASS_FILE,
+ FILE__ENTRYPOINT,
+ &avd);
+ freecon(user_context);
+ freecon(file_context);
+ if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
+ log_it(fname, getpid(), "ENTRYPOINT FAILED", tabname);
+ goto next_crontab;
+ }
+ }
+#endif
u = load_user(crontab_fd, pw, fname);
if (u != NULL) {
u->mtime = statbuf->st_mtime;
--- vixie-cron-3.0.1/do_command.c.selinux 2003-05-20 14:53:12.000000000 -0400
+++ vixie-cron-3.0.1/do_command.c 2003-05-20 14:58:06.000000000 -0400
@@ -29,6 +29,9 @@ static char rcsid[] = "$Id: do_command.c
# include <syslog.h>
#endif
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#endif
static void child_process __P((entry *, user *)),
do_univ __P((user *));
@@ -251,6 +254,20 @@ child_process(e, u)
*/
(void) signal(SIGCHLD, SIG_DFL);
#endif
+#ifdef WITH_SELINUX
+ if (is_selinux_enabled()) {
+ security_context_t scontext;
+ if (get_default_context(u->name, NULL, &scontext)) {
+ fprintf(stderr, "execle_secure: couldn't get security context for user %s\n", u->name);
+ _exit(ERROR_EXIT);
+ }
+ if (setexeccon(scontext) < 0) {
+ fprintf(stderr, "Could not set exec context to %s for user %s\n", scontext,u->name);
+ _exit(ERROR_EXIT);
+ }
+ freecon(scontext);
+ }
+#endif
execle(shell, shell, "-c", e->cmd, (char *)0, e->envp);
fprintf(stderr, "execl: couldn't exec `%s'\n", shell);
perror("execl");
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