Bug 767914 (CVE-2011-4611)

Summary:	CVE-2011-4611 kernel: perf, powerpc: Handle events that raise an exception without overflowing
Product:	[Other] Security Response	Reporter:	Eugene Teo (Security Response) <eteo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, anton, arozansk, bhu, dhoward, fhrbata, jkacur, kernel-mgr, lgoncalv, lwang, plougher, pmatouse, rt-maint, sforsber, vgoyal, williams, yowang
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:	2013-08-24 13:55:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	755737, 767917, 782688, 1020604
Bug Blocks:	757776

Description Eugene Teo (Security Response) 2011-12-15 08:45:45 UTC

A PMC is 32 bits (ie an int). Since we pass it around as an unsigned long, we need to cast it before doing the comparison.

This does not affect the upstream kernel as it is already fixed. This is an issue that was introduced in bug 720743.

Upstream commit:
http://git.kernel.org/linus/0837e3242c73566fc1c0196b4ec61779c25ffc93

Acknowledgements:

Red Hat would like to thank Maynard Johnson for reporting this issue.

Comment 2 Kurt Seifried 2011-12-15 16:18:30 UTC

Assigned CVE-2011-4611 to this issue http://seclists.org/oss-sec/2011/q4/504

Comment 3 Eugene Teo (Security Response) 2012-01-18 07:14:55 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 782688]

Comment 6 Eugene Teo (Security Response) 2012-01-29 14:54:55 UTC

Statement:

This issue did not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4 and 5 as they did not have support for Performance event. It did not affect Red Hat Enterprise MRG as it did not provide support for PowerPC. This has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2012-0350.html.

Comment 7 errata-xmlrpc 2012-03-06 18:45:22 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