Bug 1083246 (CVE-2014-2672)

Summary:	CVE-2014-2672 kernel: ath9k: tid->sched race in ath_tx_aggr_sleep()
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:	agordeev, aquini, bhu, davej, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, nobody, npajkovs, pholasek, 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:	It was found that a remote attacker could use a race condition flaw in the ath_tx_aggr_sleep() function to crash the system by creating large network traffic on the system's Atheros 9k wireless network adapter.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-08-06 17:40:51 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:	1083249, 1083250, 1083251, 1083252, 1083253, 1083254, 1083255, 1093340
Bug Blocks:	1083261

Description Petr Matousek 2014-04-01 18:35:16 UTC

We check tid->sched without a lock taken on ath_tx_aggr_sleep(). That is race condition which can result of doing list_del(&tid->list) twice (second time with poisoned list node) and causing a crash.

Upstream fixes:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21f8aaee0c62708654988ce092838aa7df4d25d8

References:
http://seclists.org/oss-sec/2014/q1/701

Comment 1 Petr Matousek 2014-04-01 18:36:26 UTC

Statement:

This issued does not affect Red Hat Enterprise Linux 5 because we do not provide support for Atheros 9k wireless network adapters.

Comment 3 Petr Matousek 2014-04-01 18:38:47 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1083253]

Comment 6 errata-xmlrpc 2014-05-27 16:27:28 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 7 errata-xmlrpc 2014-07-29 15:51:40 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 8 Martin Prpič 2014-08-05 12:08:20 UTC

IssueDescription:

It was found that a remote attacker could use a race condition flaw in the ath_tx_aggr_sleep() function to crash the system by creating large network traffic on the system's Atheros 9k wireless network adapter.

Comment 9 errata-xmlrpc 2014-08-06 17:10:53 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 10 errata-xmlrpc 2014-08-27 14:01:45 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