Bug 849722 (CVE-2012-3510)

Summary:	CVE-2012-3510 kernel: taskstats: use-after-free in xacct_add_tsk()
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:	agordeev, anton, bhu, davej, dhoward, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jneedle, jonathan, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, mcressma, plougher, rt-maint, sforsber, 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:	2013-08-24 12:54:05 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:	849723, 849725
Bug Blocks:	849727

Description Petr Matousek 2012-08-20 17:16:24 UTC

An use-after-free flaw has been found in the way taskstat's TASKSTATS_CMD_ATTR_PID command and exiting tasks with already freed mm interacted. An unprivileged local user could use this flaw to crash the system or leak kernel memory.

Upstream fix:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=f0ec1aaf54caddd21c259aea8b2ecfbde4ee4fb9

References:
http://bugzilla.openvz.org/show_bug.cgi?id=2294

Acknowledgements:

Red Hat would like to thank Alexander Peslyak for reporting this issue.

Comment 2 Petr Matousek 2012-08-20 17:19:48 UTC

Statement:

This issue did not affect the versions of the Linux kernel as shipped with Red 
Hat Enterprise Linux 6 and Red Hat Enterprise MRG as they already contain 
upstream commit f0ec1aaf54cadd that fixed this issue.

Comment 3 errata-xmlrpc 2012-10-02 17:45:54 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:1323 https://rhn.redhat.com/errata/RHSA-2012-1323.html