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Message-ID: <4DA41D15.5020300@pre-sense.de>
Date: Tue, 12 Apr 2011 11:36:21 +0200
From: Timo Warns <warns@...-sense.de>
To: oss-security@...ts.openwall.com
CC: Eugene Teo <eugene@...hat.com>, Josh Bressers <bressers@...hat.com>
Subject: Re: CVE request: kernel: fs/partitions: Kernel heap
overflow via corrupted LDM partition tables
Am 24.02.2011 02:25, schrieb Eugene Teo:
> On 02/24/2011 03:59 AM, Josh Bressers wrote:
>> ----- Original Message -----
>>>
>>> The kernel automatically evaluates partition tables of storage devices.
>>> The code for evaluating LDM partitions (in fs/partitions/ldm.c) contains
>>> a bug that allows to overflow the kernel heap. It may be possible to
>>> escalate privileges by exploiting this bug.
>>>
>>> (This bug is distinct from the LDM bug reported by Eugene Teo on
>>> 2011-02-23.)
>>>
>>> This should affect both, 2.4 and 2.6 kernel. As a prerequisite,
>>> CONFIG_LDM_PARTITION needs to be set.
>>>
>>
>> Can you point to a commit message or something else that is public? It's
>> not clear how this differs from Eugene's request.
>
> As far as I can tell, it's not public yet. Timo will follow-up once his
> patch is accepted.
A patch is now available at
http://www.spinics.net/lists/mm-commits/msg83181.html
Best regards, Timo
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