Bug 1083512 (CVE-2014-2706)

Summary:	CVE-2014-2706 Kernel: net: mac80211: crash dues to AP powersave TX vs. wakeup race
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, aquini, dhoward, fhrbata, jkurik, jtanenba, kernel-mgr, lwang, nobody, npajkovs, pholasek, plougher, pmatouse, rvrbovsk
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A race condition flaw was found in the way the Linux kernel's mac80211 subsystem implementation handled synchronization between TX and STA wake-up code paths. A remote attacker could use this flaw to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-08-06 17:39:07 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:	1083531, 1083532, 1083533, 1083534, 1083535, 1083536, 1083538, 1093618
Bug Blocks:	1083460

Description Prasad Pandit 2014-04-02 11:29:09 UTC

A Linux kernel built with a Generic IEEE 802.11 Networking Stack
(CONFIG_MAC80211) is vulnerable to a crash caused by a race condition in frame
transmission path and station wakeup event, in case when it's sleeping.
The crash occurs because, mac80211 stack buffers frames when the station is
sleeping, and the same are transmitted upon the station's(STA) wakeup. At this
point, a buffered TX frame list is being emptied, while a new frame is being
added to the RX list.

A remote unprivileged user/program could use this flaw to crash the system
kernel, resulting in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/1d147bfa64293b2723c4fec50922168658e613ba

Reference:
----------
  -> http://seclists.org/oss-sec/2014/q2/7

Comment 1 Prasad Pandit 2014-04-02 12:08:30 UTC

Statement:

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

Comment 4 Prasad Pandit 2014-04-02 12:17:28 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1083538]

Comment 6 errata-xmlrpc 2014-05-27 16:27:48 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0557 https://rhn.redhat.com/errata/RHSA-2014-0557.html

Comment 8 errata-xmlrpc 2014-07-29 15:52:35 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:0981 https://rhn.redhat.com/errata/RHSA-2014-0981.html

Comment 9 Martin Prpič 2014-08-05 12:08:59 UTC

IssueDescription:

A race condition flaw was found in the way the Linux kernel's mac80211 subsystem implementation handled synchronization between TX and STA wake-up code paths. A remote attacker could use this flaw to crash the system.

Comment 10 errata-xmlrpc 2014-08-06 17:11:04 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1023 https://rhn.redhat.com/errata/RHSA-2014-1023.html

Comment 11 errata-xmlrpc 2014-08-27 14:01:56 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6.4 EUS - Server and Compute Node Only

Via RHSA-2014:1101 https://rhn.redhat.com/errata/RHSA-2014-1101.html