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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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:
Embargoed:
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