Bug 966754 (CVE-2013-2116)

Summary:	CVE-2013-2116 gnutls: out of bounds read in _gnutls_ciphertext2compressed (GNUTLS-SA-2013-2)
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	fweimer, jrusnack, security-response-team, tmraz
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:	2013-10-01 07:08:33 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:	967090, 967091, 967092, 967093, 968447, 968448
Bug Blocks:	966934

Description Tomas Hoger 2013-05-23 21:37:45 UTC

A flaw was found in the way GnuTLS decrypted TLS record packets when using CBC encryption.  The number of pad bytes read form the packet was not checked against the cipher text size, resulting in an out of bounds read.  This could cause a TLS client or server using GnuTLS to crash.

This problem was introduced by a fix for Lucky 13 issue CVE-2013-1619, released in Red Hat Enterprise Linux 5 and 6 via RHSA-2013:0588:
https://rhn.redhat.com/errata/RHSA-2013-0588.html

This issue did not affect GnuTLS 3.x which used different patch for Lucky 13, only patch for 2.x, which did not implement all protections to avoid leak of timing information, contains this bug.

Issue was reported on upstream mailing list:
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6753

Following patch was applied upstream:
https://gitorious.org/gnutls/gnutls/commit/5164d5a1d57cd0372a5dd074382ca960ca18b27d

Comment 9 Tomas Hoger 2013-05-27 12:07:51 UTC

First reported via:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=709301

Comment 10 Tomas Hoger 2013-05-29 16:47:05 UTC

Making bug public.

Comment 11 Tomas Hoger 2013-05-29 18:07:24 UTC

Created mingw-gnutls tracking bugs for this issue

Affects: fedora-all [bug 968448]

Comment 12 Tomas Hoger 2013-05-29 18:07:33 UTC

Created gnutls tracking bugs for this issue

Affects: fedora-all [bug 968447]

Comment 13 Tomas Hoger 2013-05-29 20:55:52 UTC

Upstream advisory GNUTLS-SA-2013-2:
http://www.gnutls.org/security.html#GNUTLS-SA-2013-2

Comment 14 errata-xmlrpc 2013-05-30 18:10:26 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2013:0883 https://rhn.redhat.com/errata/RHSA-2013-0883.html

Comment 15 Fedora Update System 2013-06-11 09:01:02 UTC

mingw-gnutls-2.12.23-2.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 16 Fedora Update System 2013-06-11 09:08:10 UTC

gnutls-2.12.23-2.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 17 Fedora Update System 2013-06-11 09:10:36 UTC

mingw-gnutls-2.12.23-2.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 18 Fedora Update System 2013-06-11 09:19:15 UTC

gnutls-2.12.23-2.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 19 errata-xmlrpc 2013-07-16 17:11:53 UTC

This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2013:1076 https://rhn.redhat.com/errata/RHSA-2013-1076.html