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SubjectRe: [PATCH, local root on 2.4, 2.6?] compute_creds race
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Andy Lutomirski <luto@myrealbox.com> writes:

> The setuid program is now running with uid=euid=500 but full permitted
> capabilities. There are two (or three) ways to effectively get local
> root now:

What about this slightly shorter fix?

diff -urN a/fs/exec.c b/fs/exec.c
--- a/fs/exec.c Fri Mar 12 01:19:06 2004
+++ b/fs/exec.c Sat Apr 10 10:54:20 2004
@@ -942,6 +942,9 @@
if(!capable(CAP_SETUID)) {
bprm->e_uid = current->uid;
bprm->e_gid = current->gid;
+ cap_clear (bprm->cap_inheritable);
+ cap_clear (bprm->cap_permitted);
+ cap_clear (bprm->cap_effective);
}
}
}
Regards, Olaf.
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