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at/selinux_mail.patch
Marcela Mašláňová 04cf46f800 - thanks dwalsh for selinux patch, which fix #460873
2008-09-17 08:52:38 +00:00

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diff -up at-3.1.10/atd.c.mailselinux at-3.1.10/atd.c
--- at-3.1.10/atd.c.mailselinux 2008-09-17 10:45:38.000000000 +0200
+++ at-3.1.10/atd.c 2008-09-17 10:49:48.000000000 +0200
@@ -224,6 +224,69 @@ myfork()
#define ATD_MAIL_NAME "mailx"
#endif
+#ifdef WITH_SELINUX
+static int set_selinux_context(const char *name, const char *filename) {
+ security_context_t user_context=NULL;
+ security_context_t file_context=NULL;
+ struct av_decision avd;
+ int retval=-1;
+ char *seuser=NULL;
+ char *level=NULL;
+
+ if (getseuserbyname(name, &seuser, &level) == 0) {
+ retval=get_default_context_with_level(seuser, level, NULL, &user_context);
+ free(seuser);
+ free(level);
+ if (retval) {
+ if (security_getenforce()==1) {
+ perr("execle: couldn't get security context for user %s\n", name);
+ } else {
+ syslog(LOG_ERR, "execle: couldn't get security context for user %s\n", name);
+ return -1;
+ }
+ }
+ }
+
+ /*
+ * 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 (fgetfilecon(STDIN_FILENO, &file_context) < 0)
+ perr("fgetfilecon FAILED %s", filename);
+
+ retval = security_compute_av(user_context,
+ file_context,
+ SECCLASS_FILE,
+ FILE__ENTRYPOINT,
+ &avd);
+ freecon(file_context);
+ if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
+ if (security_getenforce()==1) {
+ perr("Not allowed to set exec context to %s for user %s\n", user_context,name);
+ } else {
+ syslog(LOG_ERR, "Not allowed to set exec context to %s for user %s\n", user_context,name);
+ retval = -1;
+ goto err;
+ }
+ }
+ if (setexeccon(user_context) < 0) {
+ if (security_getenforce()==1) {
+ perr("Could not set exec context to %s for user %s\n", user_context,name);
+ retval = -1;
+ } else {
+ syslog(LOG_ERR, "Could not set exec context to %s for user %s\n", user_context,name);
+ }
+ }
+ err:
+ freecon(user_context);
+ return 0;
+}
+#endif
+
+
static void
run_file(const char *filename, uid_t uid, gid_t gid)
{
@@ -486,61 +549,8 @@ run_file(const char *filename, uid_t uid
#ifdef WITH_SELINUX
if (selinux_enabled>0) {
- security_context_t user_context=NULL;
- security_context_t file_context=NULL;
- int retval=0;
- struct av_decision avd;
- char *seuser=NULL;
- char *level=NULL;
-
- if (getseuserbyname(pentry->pw_name, &seuser, &level) == 0) {
- retval=get_default_context_with_level(seuser, level, NULL, &user_context);
- free(seuser);
- free(level);
- if (retval) {
- if (security_getenforce()==1) {
- perr("execle: couldn't get security context for user %s\n", pentry->pw_name);
- } else {
- syslog(LOG_ERR, "execle: couldn't get security context for user %s\n", pentry->pw_name);
- goto out;
- }
- }
- }
-
- /*
- * 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 (fgetfilecon(STDIN_FILENO, &file_context) < 0) {
- if (security_getenforce() > 0) {
- perr("fgetfilecon FAILED %s", filename);
- } else {
- syslog(LOG_ERR, "fgetfilecon FAILED %s", filename);
- goto out;
- }
- }
- retval = security_compute_av(user_context,
- file_context,
- SECCLASS_FILE,
- FILE__ENTRYPOINT,
- &avd);
- freecon(file_context);
- if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
- if (security_getenforce()==1)
- perr("Not allowed to set exec context to %s for user %s\n", user_context,pentry->pw_name);
- }
-
- if (setexeccon(user_context) < 0) {
- if (security_getenforce()==1) {
- perr("Could not set exec context to %s for user %s\n", user_context,pentry->pw_name);
- } else {
- syslog(LOG_ERR, "Could not set exec context to %s for user %s\n", user_context,pentry->pw_name);
- }
- }
- freecon(user_context);
+ if (set_selinux_context(pentry->pw_name, filename) < 0)
+ perr("SELinux Failed to set context\n");
}
#endif
@@ -654,47 +664,8 @@ run_file(const char *filename, uid_t uid
#ifdef WITH_SELINUX
if (selinux_enabled>0) {
- security_context_t user_context=NULL;
- security_context_t file_context=NULL;
- int retval=0;
- struct av_decision avd;
-
- if (get_default_context(pentry->pw_name, NULL, &user_context))
- perr("execle: couldn't get security context for user %s\n", pentry->pw_name);
- /*
- * 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 (fgetfilecon(STDIN_FILENO, &file_context) < 0)
- perr("fgetfilecon FAILED %s", filename);
-
- retval = security_compute_av(user_context,
- file_context,
- SECCLASS_FILE,
- FILE__ENTRYPOINT,
- &avd);
- freecon(file_context);
- if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
- if (security_getenforce()==1) {
- perr("Not allowed to set exec context to %s for user %s\n", user_context,pentry->pw_name);
- } else {
- syslog(LOG_ERR, "Not allowed to set exec context to %s for user %s\n", user_context,pentry->pw_name);
- goto out;
- }
- }
-
- if (setexeccon(user_context) < 0) {
- if (security_getenforce()==1) {
- perr("Could not set exec context to %s for user %s\n", user_context,pentry->pw_name);
- } else {
- syslog(LOG_ERR, "Could not set exec context to %s for user %s\n", user_context,pentry->pw_name);
- }
- }
- out:
- freecon(user_context);
+ if (set_selinux_context(pentry->pw_name, filename) < 0)
+ perr("SELinux Failed to set context\n");
}
#endif
execl(ATD_MAIL_PROGRAM, ATD_MAIL_NAME, mailname, (char *) NULL);
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