Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 31 Aug 2012 11:49:44 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request -- kernel: net: slab corruption due
 to improper synchronization around inet->opt

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 08/31/2012 10:11 AM, 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.
> 
> Upstream fix: 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f6d8bd051c391c1c0458a30b2a7abcd939329259
>
>  Thanks,

Please use CVE-2012-3552 for this issue.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/

iQIcBAEBAgAGBQJQQPk3AAoJEBYNRVNeJnmTr4MQAN43Jo7Nzj0XlElHltuXQLip
jLGxHN+TuetYh93t6Uw1l2x6uH87a69BRrWoBe8uiihmp0QdGiVfzVeFLEtD7wQW
ScoXrghc9ru1fz+eZVkmB/f5/jMc4B+Yl/leqVGp+Eab8BLavdrUibQTAXOs7nmD
vAMN95nCgEoTTiKQnf0HnSxYY67cv29duTvWpDE9N5Qr+Vf2x+0uyuXhpyPhp/ZE
94n7cOHiimJ7hEEXafPKAjcohxvU3WhzvpbHtZ7gNNaTQfq3LRrt7E64NZKXsner
Y3F7Q6yvN8t+96fTYqTJeRG6MJwCDLs/m2d1v1ynO+CMjsQTKLM3d+9AeBOY/RBC
uhFtKVJe/CCokPs3+c08659ecvC+Usf+XooBiHP2tr2IKby/suBdKJXqiF9str7j
RIpuUVS7QDKiz+73R4XXQF3K0bB2FXP7sGnFvmyWkYoyqtZUxEf2IE+svNHDPEyD
350n6A5QHwloL1adkQ36eSX8vLLHs1Q9zYNOBhkGMHjahz+MQuUUzlDjJJq7ysNl
+QwKbdtyoTBD0P8VfbQHrt9uw86DxaJTJMJnuEy0Xz3utPy2ysC+ogo6tvn3/nTR
pOL4Qeov82jci72oicw7Wna5mrLB4x3j3sxXbZ3Nv88J0CxRmSd3exhe0qZoDNoX
C3TaxTH3xMFkEExW/aW5
=OvkL
-----END PGP SIGNATURE-----

Powered by blists - more mailing lists

Your e-mail address:

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.