[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Tue, 19 Mar 2013 10:16:25 +0400
From: Solar Designer <solar@...nwall.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request -- kernel: net: slab corruption due to improper synchronization around inet->opt
On Fri, Aug 31, 2012 at 06:11:53PM +0200, Petr Matousek wrote:
> Description of the problem:
> Lack proper synchronization to manipulate inet->opt ip_options can lead
> to system crash.
>
> Problem is that ip_make_skb() calls ip_setup_cork() and ip_setup_cork()
> possibly makes a copy of ipc->opt (struct ip_options), without any
> protection against another thread manipulating inet->opt. Another thread
> can change inet->opt pointer and free old one under us.
>
> Given right server application (setting socket options and processing
> traffic over the same socket at the same time), remote attacker could
> use this flaw to crash the system. More likely though, local
> unprivileged user could use this flaw to crash the system.
What are our reasons to claim that this is merely a DoS, as opposed to a
potential for arbitrary code execution with kernel privileges (at least
in the local attack case)?
> Upstream fix:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f6d8bd051c391c1c0458a30b2a7abcd939329259
This was assigned CVE-2012-3552:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3552
Alexander
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
