Bug 1102329 (CVE-2014-3469)

Summary:	CVE-2014-3469 libtasn1: asn1_read_value_type() 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:	jkurik, jrusnack, ktietz, lbopf, mzember, nmavrogi, security-response-team, thoger
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libtasn1 3.6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-10 12:45:26 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:	1102336, 1102337, 1102338, 1102339, 1102355, 1102356, 1103087, 1103088, 1103089
Bug Blocks:	1101736

Description Tomas Hoger 2014-05-28 18:57:56 UTC

A NULL pointer dereference flaw was found in libtasn1's asn1_read_value_type() / asn1_read_value() function. If an application called the function with a NULL value for an ivalue argument to determine the amount of memory needed to store data to be read from the ASN.1 input, libtasn1 could incorrectly attempt to dereference the NULL pointer, causing an application using the library to crash.

The libtasn1 library is used by the GnuTLS library to parse X.509 certificates.  The gnutls packages in Red Hat Enterprise Linux 5 and earlier use bundled libtasn1, packages in Red Hat Enterprise Linux 6 and later depend on the library provided by a separate libtasn1 package.

Upstream commits:
http://git.savannah.gnu.org/cgit/libtasn1.git/commit/lib/element.c?id=a8b3e14f84174e01755bfd1be5448fffce7c9ffa
http://git.savannah.gnu.org/cgit/libtasn1.git/commit/lib/element.c?id=3d6a02f19ff15a38dae9686033e37499b3968256
http://git.savannah.gnu.org/cgit/libtasn1.git/commit/lib/element.c?id=53958290ab731c8486531a3bdef54a933533579d

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

Acknowledgment:

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

Comment 4 Tomas Hoger 2014-05-30 08:18:06 UTC

Fixed upstream in libtasn1 3.6:
http://lists.gnu.org/archive/html/help-libtasn1/2014-05/msg00006.html

Comment 5 Tomas Hoger 2014-05-30 08:27:42 UTC

Created libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1103087]

Comment 6 Tomas Hoger 2014-05-30 08:27:44 UTC

Created mingw-libtasn1 tracking bugs for this issue:

Affects: fedora-all [bug 1103088]

Comment 7 Tomas Hoger 2014-05-30 08:27:47 UTC

Created mingw32-gnutls tracking bugs for this issue:

Affects: epel-5 [bug 1103089]

Comment 8 errata-xmlrpc 2014-06-03 16:09:45 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:0596 https://rhn.redhat.com/errata/RHSA-2014-0596.html

Comment 9 errata-xmlrpc 2014-06-03 16:10:46 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:0594 https://rhn.redhat.com/errata/RHSA-2014-0594.html

Comment 10 Fedora Update System 2014-06-04 07:52:10 UTC

libtasn1-3.6-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2014-06-10 03:06:16 UTC

libtasn1-3.6-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 12 errata-xmlrpc 2014-06-10 12:35:44 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:0687 https://rhn.redhat.com/errata/RHSA-2014-0687.html

Comment 13 errata-xmlrpc 2014-06-30 17:29:00 UTC

This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2014:0815 https://rhn.redhat.com/errata/RHSA-2014-0815.html