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/ Download attachment "signature.asc" of type "application/pgp-signature" (902 bytes)
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