Bug 1101734 (CVE-2014-3465)

Summary:	CVE-2014-3465 gnutls: gnutls_x509_dn_oid_name NULL pointer dereference
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, jkurik, jrusnack, nmavrogi, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	gnutls 3.1.20, gnutls 3.2.10	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-10 12:29:51 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:	1102027, 1102028
Bug Blocks:	1101736

Description Tomas Hoger 2014-05-27 19:58:10 UTC

A NULL pointer dereference flaw was discovered in GnuTLS's gnutls_x509_dn_oid_name().  The function, when called with the GNUTLS_X509_DN_OID_RETURN_OID flag, should not return NULL to its caller.  However, it could previously return NULL when parsed X.509 certificates included specific OIDs.

The issue was corrected upstream using the following commit:
https://www.gitorious.org/gnutls/gnutls/commit/d3648ebb04b650e6d20a2ec1fb839256b30b9fc6

The fix was first included in upstream versions 3.1.20 and 3.2.10:
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/7251
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/7250

Affected function was introduced in GnuTLS version 3.0:
http://gnutls.org/manual/html_node/X509-certificate-API.html#gnutls_005fx509_005fdn_005foid_005fname-1

The gnutls packages in Red Hat Enterprise Linux 6 and earlier include GnuTLS versions 2.x or 1.x and were therefore not affected by this issue.  The gnutls and mingw-gnutls packages in Fedora are already updated to the fixed upstream version.

Comment 1 Tomas Hoger 2014-05-27 20:00:00 UTC

Statement:

This issue did not affect the versions of gnutls as shipped with Red Hat Enterprise Linux 4, 5, and 6.

Comment 3 Tomas Hoger 2014-05-29 11:41:33 UTC

Acknowledgment:

Red Hat would like to thank GnuTLS upstream for reporting this issue.

Comment 4 errata-xmlrpc 2014-06-10 12:24:05 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:0684 https://rhn.redhat.com/errata/RHSA-2014-0684.html