Bug 920499 (CVE-2013-0914)

Summary:	CVE-2013-0914 Kernel: sa_restorer information leak
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, jshao, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, mcressma, plougher, ppandit, 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:	2014-06-10 04:47:35 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:	920503, 920504, 920505, 920506, 920508, 920509, 920510
Bug Blocks:	920455

Description Prasad Pandit 2013-03-12 09:29:18 UTC

Linux kernel is vulnerable to an information leakage flaw. This occurs when
a process calls routine - sigaction() - to access - sa_restorer - parameter.
This parameter points to an address that belongs to its parent process'
address space.

A user could use this flaw to infer address layout of a process.

Reference:
----------
 -> https://lkml.org/lkml/2013/3/11/498
 -> http://www.openwall.com/lists/oss-security/2013/03/11/8

Comment 1 Prasad Pandit 2013-03-12 09:34:31 UTC

Upstream fix
------------
 -> http://www.spinics.net/lists/mm-commits/msg95304.html

Comment 2 Prasad Pandit 2013-03-12 09:36:25 UTC

Statement:

This issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2 may address this issue.

Comment 5 Prasad Pandit 2013-03-12 09:43:22 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 920510]

Comment 6 Josh Boyer 2013-03-12 13:30:01 UTC

(In reply to comment #1)
> Upstream fix
> ------------
>  -> http://www.spinics.net/lists/mm-commits/msg95304.html

That's the fix for 3.9.  It's worth pointing out that __ARCH_HAS_SA_RESTORER was added in 3.9, so using that patch as-is on older kernels without that change will build but won't do anything.  Using SA_RESTORER works for kernels older than 3.9-rcX.

https://lkml.org/lkml/2013/3/11/545

Comment 7 Fedora Update System 2013-03-17 01:07:26 UTC

kernel-3.8.3-201.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2013-03-22 00:18:38 UTC

kernel-3.8.3-103.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 errata-xmlrpc 2013-05-20 16:50:59 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2013:0829 https://rhn.redhat.com/errata/RHSA-2013-0829.html

Comment 11 errata-xmlrpc 2013-07-10 03:52:45 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:1034 https://rhn.redhat.com/errata/RHSA-2013-1034.html

Comment 12 errata-xmlrpc 2013-07-16 17:26:02 UTC

This issue has been addressed in following products:

  OpenStack 3 for RHEL 6

Via RHSA-2013:1080 https://rhn.redhat.com/errata/RHSA-2013-1080.html

Comment 13 errata-xmlrpc 2013-07-16 18:23:48 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:1051 https://rhn.redhat.com/errata/RHSA-2013-1051.html