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Subject[PATCH] Re: Local root exploit with kmod and modutils > 2.1.121
From
Date

Hi,

as modprobe (insmod) seems to have POSIX args handling, we should perhaps add "--"
to the modprobe cmdline, in order to stop further args processing, and to avoid
mixing a textual argument with an option.
BTW, it should perhaps be generalized.

Xav


--- linux-2.4-test10/kernel/kmod.c Tue Sep 26 01:18:55 2000
+++ linux/kernel/kmod.c Thu Nov 16 19:57:45 2000
@@ -133,7 +133,7 @@
static int exec_modprobe(void * module_name)
{
static char * envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
- char *argv[] = { modprobe_path, "-s", "-k", (char*)module_name, NULL };
+ char *argv[] = { modprobe_path, "-s", "-k", "--", (char*)module_name, NULL };
int ret;

ret = exec_usermodehelper(modprobe_path, argv, envp);

-
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