Bug 749156 (CVE-2011-4077)

Summary:	CVE-2011-4077 kernel: xfs: potential buffer overflow in xfs_readlink()
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anton, arozansk, bhu, cmaiolin, davej, dhoward, fhrbata, gansalmon, itamar, jkacur, jonathan, jwboyer, kernel-maint, kernel-mgr, kmcmartin, lgoncalv, lwang, madhu.chinakonda, plougher, rt-maint, sforsber, tcallawa, vgoyal, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-04-24 04:10:48 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	694702, 749159, 749160, 749161, 749162, 749166, 761375
Bug Blocks:	749153

Description Petr Matousek 2011-10-26 10:43:24 UTC

A flaw was found in the way Linux kernel's XFS filesystem implementation handled links with pathname larger than MAXPATHLEN. When CONFIG_XFS_DEBUG configuration option was not enabled when compiling Linux kernel, an attacker able to mount malicious XFS image could use this flaw to crash the system, or potentially, elevate his privileges on that system.

Proposed upstream patch:
http://oss.sgi.com/archives/xfs/2011-10/msg00345.html

Comment 4 Petr Matousek 2011-10-26 10:50:47 UTC

Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not include support for XFS filesystem. This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0007.html, https://rhn.redhat.com/errata/RHSA-2012-0350.html, and https://rhn.redhat.com/errata/RHSA-2012-0333.html.

Comment 5 Petr Matousek 2011-10-26 10:58:34 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 749166]

Comment 6 Eugene Teo (Security Response) 2011-11-09 19:25:37 UTC

http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xfs/xfs.git;a=commitdiff;h=b52a360b2aa1c59ba9970fb0f52bbb093fcc7a24

Comment 8 errata-xmlrpc 2012-01-10 20:08:54 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:0007 https://rhn.redhat.com/errata/RHSA-2012-0007.html

Comment 12 errata-xmlrpc 2012-02-23 20:23:07 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2012:0333 https://rhn.redhat.com/errata/RHSA-2012-0333.html

Comment 13 errata-xmlrpc 2012-03-06 18:44:20 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0350 https://rhn.redhat.com/errata/RHSA-2012-0350.html