Bug 1140325 (CVE-2014-3631)

Summary: CVE-2014-3631 kernel: keys: incorrect termination condition in assoc array garbage collection
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: agordeev, aquini, bhu, dhoward, dhowells, esammons, fhrbata, fj-lsoft-kernel-it, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, nmurray, plougher, rt-maint, rvrbovsk, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
A flaw was found in the way the Linux kernel's keys subsystem handled the termination condition in the associative array garbage collection functionality. A local, unprivileged user could use this flaw to crash the system.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2018-02-01 16:58:26 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: 1116347, 1139431, 1155136    
Bug Blocks: 829181    
Attachments:
Description Flags
Upstream patch proposal none

Description Petr Matousek 2014-09-10 16:59:19 UTC 
A flaw was found in the way the termination condition in the associative array
garbage collection functionality was handled when used from the keys subsystem.

A local unprivileged user could use this flaw to crash the system.

Introduced by:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b2a4df200d570b2c33a57e1ebfa5896e4bc81b69
Comment 1 Petr Matousek 2014-09-10 17:02:15 UTC 
Created attachment 936266 [details]
Upstream patch proposal
Comment 2 Petr Matousek 2014-09-10 17:03:31 UTC 
Statement:

This issue does not affect versions of the 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 7 may address this issue.
Comment 4 David Howells 2014-09-10 21:32:01 UTC 
The patch has been posted upstream: https://lkml.org/lkml/2014/9/10/788
Comment 5 David Howells 2014-09-15 09:45:46 UTC 
The patch has been applied upstream:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95389b08d93d5c06ec63ab49bd732b0069b7c35e
Comment 7 Petr Matousek 2014-10-21 12:46:31 UTC 
*** Bug 1154979 has been marked as a duplicate of this bug. ***
Comment 8 Petr Matousek 2014-10-29 09:18:23 UTC 
Acknowledgements:

Red Hat would like to thank Frey Alfredsson for reporting this issue.
Comment 9 Martin Prpič 2014-12-05 14:30:37 UTC 
IssueDescription:

A flaw was found in the way the Linux kernel's keys subsystem handled the termination condition in the associative array garbage collection functionality. A local, unprivileged user could use this flaw to crash the system.
Comment 10 errata-xmlrpc 2014-12-09 20:35:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1971 https://rhn.redhat.com/errata/RHSA-2014-1971.html