Bug 908693 (CVE-2013-0268)

Summary:	CVE-2013-0268 kernel: x86/msr: /dev/cpu/*/msr local privilege escalation
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
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, rvrbovsk, 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:	2013-03-27 12:45:55 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:	908696, 908697, 908698, 908699, 908702, 908703, 908706
Bug Blocks:	907435

Description Petr Matousek 2013-02-07 10:53:05 UTC

Access to /dev/cpu/*/msr was protected only using filesystem checks. A local uid 0 (root) user with all capabilities dropped could use this flaw to execute arbitrary code in kernel mode.

Upstream commit:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=c903f0456bc69176912dee6dd25c6a66ee1aed00

References:
http://grsecurity.net/~spender/msr32.c

Comment 3 Petr Matousek 2013-02-07 11:02:26 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 908706]

Comment 4 Fedora Update System 2013-02-08 16:56:30 UTC

kernel-3.7.6-201.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Petr Matousek 2013-02-11 19:16:48 UTC

Statement:

This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

Comment 6 errata-xmlrpc 2013-03-11 18:39:51 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2013:0622 https://rhn.redhat.com/errata/RHSA-2013-0622.html

Comment 7 errata-xmlrpc 2013-03-11 19:39:14 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:0621 https://rhn.redhat.com/errata/RHSA-2013-0621.html

Comment 8 errata-xmlrpc 2013-03-12 18:59:46 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:0630 https://rhn.redhat.com/errata/RHSA-2013-0630.html