Bug 1315202 (CVE-2016-1979)

Summary:	CVE-2016-1979 nss: Use-after-free during processing of DER encoded keys in NSS (MFSA 2016-36)
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:	security-response-team, slawomir
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A use-after-free flaw was found in the way NSS processed certain DER (Distinguished Encoding Rules) encoded cryptographic keys. An attacker could use this flaw to create a specially crafted DER encoded certificate which, when parsed by an application compiled against the NSS library, could cause that application to crash, or execute arbitrary code using the permissions of the user running the application.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:49:26 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:	1316003, 1323648, 1323649, 1323650, 1323651, 1323652
Bug Blocks:	1310521

Description Huzaifa S. Sidhpurwala 2016-03-07 09:02:25 UTC

Mozilla developer Tim Taubert used the Address Sanitizer tool and software fuzzing to discover a use-after-free vulnerability while processing DER encoded keys in the Network Security Services (NSS) libraries. The vulnerability overwrites the freed memory with zeroes. This issue has been addressed in NSS 3.21.1, shipping in Firefox 45. 

External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2016-36

Comment 1 Huzaifa S. Sidhpurwala 2016-03-07 09:02:32 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Tim Taubert

Comment 2 Huzaifa S. Sidhpurwala 2016-03-09 08:43:39 UTC

Created nss tracking bugs for this issue:

Affects: fedora-all [bug 1316003]

Comment 4 errata-xmlrpc 2016-04-05 11:20:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0591 https://rhn.redhat.com/errata/RHSA-2016-0591.html

Comment 5 errata-xmlrpc 2016-04-25 11:58:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0685 https://rhn.redhat.com/errata/RHSA-2016-0685.html

Comment 6 errata-xmlrpc 2016-04-25 12:15:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2016:0684 https://rhn.redhat.com/errata/RHSA-2016-0684.html