From: Olaf Dietsche <olaf+list.linux-kernel@olafdietsche.de>
To: Andy Lutomirski <luto@myrealbox.com>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>,
akpm@osdl.org, torvalds@osdl.org
Subject: Re: [PATCH, local root on 2.4, 2.6?] compute_creds race
Date: Sat, 10 Apr 2004 11:16:06 +0200 [thread overview]
Message-ID: <87fzbc19d5.fsf@goat.bogus.local> (raw)
In-Reply-To: 4076F02E.1000809@myrealbox.com
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.
next prev parent reply other threads:[~2004-04-10 9:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-09 18:49 [PATCH, local root on 2.4, 2.6?] compute_creds race Andy Lutomirski
2004-04-09 20:43 ` Chris Wright
2004-04-09 20:53 ` Andy Lutomirski
2004-04-10 9:16 ` Olaf Dietsche [this message]
2004-04-10 15:40 ` Andy Lutomirski
2004-04-10 18:41 ` Olaf Dietsche
2004-04-10 18:59 ` Andy Lutomirski
2004-04-10 10:32 ` Olaf Dietsche
2004-04-12 18:40 ` Chris Wright
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