Bug 1083246 (CVE-2014-2672) - CVE-2014-2672 kernel: ath9k: tid->sched race in ath_tx_aggr_sleep()
Summary: CVE-2014-2672 kernel: ath9k: tid->sched race in ath_tx_aggr_sleep()
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2014-2672
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Engineering1083249 Engineering1083250 Engineering1083251 Engineering1083252 1083253 Engineering1083254 Engineering1083255 Engineering1093340
Blocks: Embargoed1083261
TreeView+ depends on / blocked
 
Reported: 2014-04-01 18:35 UTC by Petr Matousek
Modified: 2021-02-17 06:43 UTC (History)
31 users (show)

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.
Clone Of:
Environment:
Last Closed: 2014-08-06 17:40:51 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:0557 0 normal SHIPPED_LIVE Important: kernel-rt security update 2014-05-27 20:25:52 UTC
Red Hat Product Errata RHSA-2014:0981 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2014-07-29 19:51:12 UTC
Red Hat Product Errata RHSA-2014:1023 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2014-08-06 21:10:29 UTC
Red Hat Product Errata RHSA-2014:1101 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2014-08-27 18:01:22 UTC

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
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