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Date: Wed, 03 Oct 2012 20:10:25 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request -- kernel: compat: SIOCGSTAMP/SIOCGSTAMPNS
incorrect order of arguments to compat_put_time[val|spec]
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 10/03/2012 04:08 PM, Petr Matousek wrote:
> Description of the problem:
>
> Commit 644595f89620 ("compat: Handle COMPAT_USE_64BIT_TIME in
> net/socket.c") introduced a bug where the helper functions to take
> either a 64-bit or compat time[spec|val] got the arguments in the
> wrong order, passing the kernel stack pointer off as a user pointer
> (and vice versa).
>
> On architectures that use separate address spaces for userspace
> and kernel (for example PA-RISC), an unprivileged local user can
> crash the system or read kernel memory.
>
> Introduced in:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=644595f89620
>
> Upstream fix:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=ed6fe9d614f
>
> Acknowledgements:
>
> This issue was discovered by Mikulas Patocka of Red Hat.
>
> Thanks,
>
Please use CVE-2012-4467 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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