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Date: Wed, 04 Dec 2013 18:09:40 +1100
From: Murray McAllister <mmcallis@...hat.com>
To: oss-security@...ts.openwall.com
CC: Kurt Seifried <kseifried@...hat.com>, security <security@...ntu.com>,
        xorg_security@...rg, jamie@...onical.com
Subject: Re: CVE Request: xorg-server and pixman

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?

--
Murray McAllister / Red Hat Security Response Team

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