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Date: Mon, 15 Jul 2013 10:53:31 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com,
Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: Re: CVE Request -- Linux kernel: ipv6: BUG_ON in fib6_add_rt2node()
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Hash: SHA1
On 07/15/2013 10:24 AM, Petr Matousek wrote:
> If two router advertisment speaker announce seperate default
> gateways with infinite timeout the kernel currently packs these
> routes together into an ecmp route set. If one of the RA speaker
> now changes the advertised expiration to a lower value and a third
> route with infinite timeout pops up we end up with a BUG_ON.
>
> Remote attacker could use this flaw to crash the system.
>
> Fixed by:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=307f2fb95e9b96b3577916e73d92e104f8f26494
>
> Introduced by:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51ebd3181572af8d5076808dab2682d800f6da5d
>
> Introduced in upstream version: v3.7-rc1
>
> Acknowledgements:
>
> Red Hat would like to thank Hannes Frederic Sowa for reporting
> this issue.
>
Please use CVE-2013-4125 for this issue.
- --
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993
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