Bug 1024854 (CVE-2013-4483)

Summary:	CVE-2013-4483 kernel: ipc: ipc_rcu_putref refcount races
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, bhu, dhoward, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, madhu.chinakonda, mcressma, nobody, 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 ipc_rcu_putref() function in the Linux kernel's IPC implementation handled reference counter decrementing. A local, unprivileged user could use this flaw to trigger an Out of Memory (OOM) condition and, potentially, crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-20 10:41:45 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:	1024265, 1024866, 1024868, 1024869, 1024870, 1024871
Bug Blocks:	1024901

Description Petr Matousek 2013-10-30 14:04:42 UTC

A flaw was found in the way ipc_rcu_putref() function handled reference counter decrementing. Without external synchronization reference counter might not be adjusted properly, as presented with the freeque() vs do_msgsnd() race, leading to memory leaks.

An unprivileged local user could use this flaw to cause OOM conditions, potentially crashing the system.

References:
https://wiki.openvz.org/Download/kernel/rhel6-testing/042stab084.3

Upstream patch:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6062a8
(making the refcounter atomic hunks)

Acknowledgements:

Red Hat would like to thank Vladimir Davydov (Parallels) for reporting this issue.

Comment 4 Petr Matousek 2013-10-30 14:47:09 UTC

Statement:

This issue does affect Linux kernel packages as shipped with Red Hat Enterprise Linux 6. Future kernel updates for respective releases may address this issue.

Comment 5 errata-xmlrpc 2014-03-12 18:29:09 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:0285 https://rhn.redhat.com/errata/RHSA-2014-0285.html

Comment 6 Vincent Danen 2014-06-20 13:30:36 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0439 https://rhn.redhat.com/errata/RHSA-2014-0439.html

Comment 7 Martin Prpič 2014-10-07 09:19:40 UTC

IssueDescription:

A flaw was found in the way the ipc_rcu_putref() function in the Linux kernel's IPC implementation handled reference counter decrementing. A local, unprivileged user could use this flaw to trigger an Out of Memory (OOM) condition and, potentially, crash the system.

Comment 8 errata-xmlrpc 2014-10-14 05:31:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1392 https://rhn.redhat.com/errata/RHSA-2014-1392.html

Comment 10 errata-xmlrpc 2015-03-03 12:50:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only

Via RHSA-2015:0284 https://rhn.redhat.com/errata/RHSA-2015-0284.html