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Date: Wed, 04 Dec 2013 11:04:12 -0700
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: security <security@...ntu.com>, xorg_security@...rg
Subject: Re: CVE Request: xorg-server and pixman

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On 12/04/2013 07:46 AM, Jamie Strandboge wrote:
> On 12/04/2013 01:09 AM, Murray McAllister wrote:
>> On 12/04/2013 03:32 PM, Kurt Seifried wrote:
>>> On 12/03/2013 10:54 AM, Jamie Strandboge wrote:
>>> 
>>>> Hi,
>>> 
>>>> This bug has been public since August but I could find a CVE
>>>> for it: https://launchpad.net/bugs/1197921
>>> 
>>>> There are two bugs - Xorg can be made to crash and pixman
>>>> can trigger the aformentioned Xorg crash. A simplified
>>>> reproducer is in the pixman patches with another reproducer
>>>> in the Launchpad bug. The xorg
>>> 
>>>> xorg-server - exa: only draw valid trapezoids The patch was 
>>>> submitted in October but doesn't seem to be applied yet, so
>>>> I'm CC'ing xorg_security. Patch references the pixman f.d.o
>>>> bug, but doesn't seem to have an associated xorg bug. 
>>>> http://patchwork.freedesktop.org/patch/14769/ 
>>>> http://lists.x.org/archives/xorg-devel/2013-October/037996.html
>>>
>>>>
>>>> 
Pixman - Corrupted CustomShape crashes Xorg
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=67484 Patch: - 
>>>> 5e14da97f16e421d084a9e735be21b1025150f0c (fix) - 
>>>> 2f876cf86718d3dd9b3b04ae9552530edafe58a1 (test case)
>>> 
>>>> Thanks!
>>> 
>>> 
>>> So only x.org crashes, you can trigger it via X.org, or via
>>> pixman? or is pixman also crashing?
>>> 
>>> 
>> 
>> From https://bugs.freedesktop.org/show_bug.cgi?id=67484 and 
>> http://patchwork.freedesktop.org/patch/14769/ it sounded like it
>> would affect both 1) crash an application using pixman 2) crash
>> the X server
>> 
>> Is that correct?
>> 
> 
> AIUI, this is correct. See: 
> https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1197921/comments/28
>
>  "No, it really is a bug in pixman too. I just fixed the same
> comparison that happens in xorg-server, but pixman is still
> affected."
> 
> 

Thanks. Please use CVE-2013-6424 for the issue in xorg-server

Please use CVE-2013-6425 for the issue in pixman.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
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