Bug 838879

Summary:	Mozilla: Enable mitigation for CVE-2011-3389 (BEAST issue) in firefox/thunderbird
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gecko-bugs-nobody, jhorak, security-response-team, stransky
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:	2012-07-18 07:31:58 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:
Bug Blocks:	835033

Description Huzaifa S. Sidhpurwala 2012-07-10 10:39:30 UTC

The mitigation for CVE-2011-3389 flaw was implemented in the Network Security Services (NSS) library.  This mitigation was added in NSS version 3.13, and is enabled by default upstream.  Environment variable NSS_SSL_CBC_RANDOM_IV can be used to disable the mitigation when it causes failures to connect to servers that are intolerant to 1/(n-1) record splitting.  Setting the environment variable value to 0 disables the mitigation.

The nss packages in Red Hat Enterprise Linux 5 and 6 were updated to version 3.13.1 via RHBA-2012:0337:
  https://rhn.redhat.com/errata/RHBA-2012-0337.html

Unlike upstream versions, this mitigation is disabled by default in nss packages in Red Hat Enterprise Linux 5 and 6.

This bug is used to track enabling of this mitigation, by seting the NSS_SSL_CBC_RANDOM_IV environment variable in the firefox and thunderbird start-up scripts.

More details about the CVE-2011-3389 flaw at:
  https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3389

Comment 2 Tomas Hoger 2012-07-16 13:12:51 UTC

This mitigation is enabled by default in upstream Firefox versions since version 9.

Comment 3 errata-xmlrpc 2012-07-17 18:57:34 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1089 https://rhn.redhat.com/errata/RHSA-2012-1089.html

Comment 4 errata-xmlrpc 2012-07-17 19:27:57 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1088 https://rhn.redhat.com/errata/RHSA-2012-1088.html