Bug 1168691 – CVE-2014-8094 xorg-x11-server: integer overflow in DRI2 extension function ProcDRI2GetBuffers()

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Bug 1168691 - (CVE-2014-8094) CVE-2014-8094 xorg-x11-server: integer overflow in DRI2 extension function ProcDRI2GetBuffers()

Summary:	CVE-2014-8094 xorg-x11-server: integer overflow in DRI2 extension function Pr...

Status:	CLOSED ERRATA

Aliases:	CVE-2014-8094

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20141209,repor...
Keywords:	Security

Depends On:	1170916 1170917 1170918 1170919
Blocks:	1168310
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Reported:	2014-11-27 10:37 EST by Vasyl Kaigorodov
Modified:	2014-12-12 03:36 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	An integer overflow flaw was found in the way the X.Org server calculated memory requirements for certain DRI2 extension requests. A malicious, authenticated client could use this flaw to crash the X.Org server.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-12-11 15:56:31 EST
Type:	---
Regression:	---
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Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
0006-dri2_integer_overflow_in_ProcDRI2GetBuffers_CVE-2014-8094.patch (1.25 KB, text/plain) 2014-11-27 10:49 EST, Vasyl Kaigorodov	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2014:1983	normal	SHIPPED_LIVE	Important: xorg-x11-server security update	2014-12-11 19:41:58 EST

Groups: None (edit)

Description Vasyl Kaigorodov 2014-11-27 10:37:51 EST

ProcDRI2GetBuffers() function call do not check that its calculations for how much memory
is needed to handle the client's request have not overflowed, so can
result in out of bounds reads or writes.  These calls all occur only
after a client has successfully authenticated itself.

Introduced in xorg-server-1.7.0 (2009).

Comment 1 Vasyl Kaigorodov 2014-11-27 10:49:03 EST

Created attachment 962135 [details]
0006-dri2_integer_overflow_in_ProcDRI2GetBuffers_CVE-2014-8094.patch

Comment 2 Huzaifa S. Sidhpurwala 2014-12-05 00:46:05 EST

Authenticated client can cause integer overflow on the server which later results in OOB read and consequent crash.

Comment 4 Vincent Danen 2014-12-09 15:17:46 EST

External References:

http://www.x.org/wiki/Development/Security/Advisory-2014-12-09/

Comment 5 errata-xmlrpc 2014-12-11 14:42:21 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 6

Via RHSA-2014:1983 https://rhn.redhat.com/errata/RHSA-2014-1983.html

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