set PR_SET_NO_NEW_PRIVS to 1
Signed-off-by: Etienne CHAMPETIER <champetier.etie...@gmail.com>
---
jail/jail.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/jail/jail.c b/jail/jail.c
index 25ad4d7..97ddaab 100644
--- a/jail/jail.c
+++ b/jail/jail.c
@@ -35,13 +35,14 @@
#include <libubox/uloop.h>
#define STACK_SIZE (1024 * 1024)
-#define OPT_ARGS "S:C:n:r:w:d:psulo"
+#define OPT_ARGS "S:C:n:r:w:d:psuloc"
static struct {
char *name;
char **jail_argv;
char *seccomp;
char *capabilities;
+ int no_new_privs;
int namespace;
int procfs;
int ronly;
@@ -212,6 +213,7 @@ static void usage(void)
fprintf(stderr, " -d <num>\tshow debug log (increase num to increase
verbosity)\n");
fprintf(stderr, " -S <file>\tseccomp filter config\n");
fprintf(stderr, " -C <file>\tcapabilities drop config\n");
+ fprintf(stderr, " -c\t\tset PR_SET_NO_NEW_PRIVS\n");
fprintf(stderr, " -n <name>\tthe name of the jail\n");
fprintf(stderr, "namespace jail options:\n");
fprintf(stderr, " -r <file>\treadonly files that should be staged\n");
@@ -239,6 +241,11 @@ static int exec_jail(void)
if (opts.capabilities && drop_capabilities(opts.capabilities))
exit(EXIT_FAILURE);
+ if (opts.no_new_privs && prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)) {
+ ERROR("prctl(PR_SET_NO_NEW_PRIVS) failed: %s\n",
strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
INFO("exec-ing %s\n", *opts.jail_argv);
execve(*opts.jail_argv, opts.jail_argv, envp);
/* we get there only if execve fails */
@@ -321,6 +328,9 @@ int main(int argc, char **argv)
opts.capabilities = optarg;
add_mount(optarg, 1, -1);
break;
+ case 'c':
+ opts.no_new_privs = 1;
+ break;
case 'n':
opts.name = optarg;
break;
--
1.9.1
_______________________________________________
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
