Bug 1374266 (CVE-2016-7444)

Summary:	CVE-2016-7444 gnutls: Incorrect certificate validation when using OCSP responses (GNUTLS-SA-2016-3)
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	anemec, erik-fedora, mike, nmavrogi, rjones, sardella, slawomir, tmraz
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	gnutls 3.4.15, gnutls 3.5.4	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the way GnuTLS validated certificates using OCSP responses. This could falsely report a certificate as valid under certain circumstances.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-13 06:45:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1374267, 1374269, 1374270, 1377569
Bug Blocks:	1374271, 1415638

Description Adam Mariš 2016-09-08 11:25:34 UTC

It was found an issue in certificate validation using OCSP responses caused by not verifying the serial length, which can falsely report a certificate as valid.

Upstream patch:

https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9

External References:

https://www.gnutls.org/security.html
https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.html

Comment 1 Adam Mariš 2016-09-08 11:28:06 UTC

Created mingw-gnutls tracking bugs for this issue:

Affects: fedora-all [bug 1374269]
Affects: epel-7 [bug 1374270]

Comment 2 Adam Mariš 2016-09-08 11:28:12 UTC

Created gnutls tracking bugs for this issue:

Affects: fedora-all [bug 1374267]

Comment 5 Fedora Update System 2016-09-12 13:18:14 UTC

gnutls-3.5.4-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2016-09-13 22:23:50 UTC

gnutls-3.4.15-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2016-09-14 01:19:14 UTC

gnutls-3.4.15-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2016-09-14 15:55:01 UTC

mingw-gnutls-3.5.4-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 9 Andrej Nemec 2016-09-19 09:33:32 UTC

CVE assignment:

http://seclists.org/oss-sec/2016/q3/549

Comment 12 errata-xmlrpc 2017-08-01 08:49:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2292 https://access.redhat.com/errata/RHSA-2017:2292