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Date: Wed, 04 Dec 2013 08:46:39 -0600
From: Jamie Strandboge <jamie@...onical.com>
To: oss-security@...ts.openwall.com
CC: Kurt Seifried <kseifried@...hat.com>, security <security@...ntu.com>,
xorg_security@...rg
Subject: Re: CVE Request: xorg-server and pixman
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."
--
Jamie Strandboge http://www.ubuntu.com/
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