Bug 718152 (CVE-2011-2517)

Summary:	CVE-2011-2517 kernel: nl80211: missing check for valid SSID size in scan operations
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	agrzywna, anton, bhu, dhoward, jkacur, kernel-mgr, lgoncalv, lwang, plougher, rt-maint, sforsber, tpelka, vgoyal, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-03-28 22:09:58 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:	718154, 718155, 718156, 718157, 718158, 753005
Bug Blocks:

Description Petr Matousek 2011-07-01 08:39:31 UTC

In both trigger_scan and sched_scan operations, we were checking for the SSID length before assigning the value correctly.  Since the memory was just kzalloc'ed, the check was always failing and SSID with over 32 characters were allowed to go through.

This is causing a buffer overflow when copying the actual SSID to the proper place.

Upstream fixes:
http://git.kernel.org/linus/208c72f4fe44fe09577e7975ba0e7fa0278f3d03
http://git.kernel.org/linus/57a27e1d6a3bb9ad4efeebd3a8c71156d6207536

Comment 4 Petr Matousek 2011-07-20 21:26:20 UTC

Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 4 as it did not provide support for the Linux wireless LAN (802.11) configuration API. This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-1212.html, https://rhn.redhat.com/errata/RHSA-2011-1189.html, and https://rhn.redhat.com/errata/RHSA-2011-1253.html.

Comment 8 errata-xmlrpc 2011-08-23 14:42:08 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:1189 https://rhn.redhat.com/errata/RHSA-2011-1189.html

Comment 9 errata-xmlrpc 2011-09-12 19:44:41 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2011:1253 https://rhn.redhat.com/errata/RHSA-2011-1253.html

Comment 10 errata-xmlrpc 2011-09-13 15:44:10 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:1212 https://rhn.redhat.com/errata/RHSA-2011-1212.html

Comment 12 errata-xmlrpc 2011-12-13 21:29:13 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5.6.Z - Server Only

Via RHSA-2011:1813 https://rhn.redhat.com/errata/RHSA-2011-1813.html