Bug 922253 (CVE-2012-6538)

Summary:	CVE-2012-6538 Kernel: xfrm_user: info leak in copy_to_user_auth
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, anton, bhu, davej, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, mcressma, npajkovs, plougher, pmatouse, rt-maint, rvrbovsk, 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:	2013-05-03 14:38:46 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:	922255, 922256, 922428, 922429
Bug Blocks:	858947

Description Prasad Pandit 2013-03-15 21:02:49 UTC

Linux kernel built with XFRM framework support is vulnerable to a memory
leakage flaw. It occurs in routine - copy_to_user_auth - when it fails to
correctly initialise the variable: alg_name.

An user/program could use this flaw to leak kernel memory bytes.

Upstream fix:
-------------
 -> https://git.kernel.org/linus/4c87308bdea31a7b4828a51f6156e6f721a1fcc9

Reference:
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 -> http://www.openwall.com/lists/oss-security/2013/03/14/21

Comment 1 Prasad Pandit 2013-03-15 21:08:27 UTC

Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.

This issue affects the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 6 . This issue has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2013-0744.html.

Comment 3 Petr Matousek 2013-05-03 14:35:27 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:0744 https://rhn.redhat.com/errata/RHSA-2013-0744.html