Bug 916646 (CVE-2013-1792)

Summary:	CVE-2013-1792 Kernel: keys: race condition in install_user_keyrings()
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
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, dhoward, esammons, fhrbata, iboverma, jkacur, lgoncalv, lwang, mcressma, mmilgram, pmatouse, security-response-team, sforsber, williams, yozone
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 05:40:24 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:	913258, 916681, 916682, 916683, 919021
Bug Blocks:	916555

Description Prasad Pandit 2013-02-28 15:17:41 UTC

A race condition leading to a NULL pointer dereference is discovered in the
Linux kernel. It occurs during parallel invocation of install_user_keyrings
& lookup_user_key routines.

An unprivileged user could use this flaw to crash the system, resulting in DoS.

Comment 3 Prasad Pandit 2013-02-28 16:37:15 UTC

Statement:

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

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

Comment 4 Prasad Pandit 2013-02-28 16:45:42 UTC

Acknowledgements:

This issue was discovered by Mateusz Guzik of Red Hat EMEA GSS SEG Team.

Comment 6 Prasad Pandit 2013-03-07 07:13:31 UTC

Upstream fix:
 -> https://lkml.org/lkml/2013/3/6/535

Comment 7 Jan Lieskovsky 2013-03-07 12:41:01 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 919021]

Comment 8 Fedora Update System 2013-03-11 01:23:55 UTC

kernel-3.8.2-206.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2013-03-22 00:19:29 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 10 errata-xmlrpc 2013-04-23 18:27:47 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

Comment 11 errata-xmlrpc 2013-05-20 16:48:51 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 12 John Kacur 2013-06-12 14:22:50 UTC

(In reply to Prasad J Pandit from comment #6)
> Upstream fix:
>  -> https://lkml.org/lkml/2013/3/6/535

She the above correct, it's empty?
Do we have a sha1 yet from Linus' tree?

Comment 13 John Kacur 2013-06-12 14:31:52 UTC

Okay, I did some detective work and found out that this is meant.
0da9dfdd2cd9889201bc6f6f43580c99165cd087

https://patchwork.kernel.org/patch/2228431/