Home / mailings [gentoo-announce] [ GLSA 201709-04 ] mod_gnutls: Certificate validation error
Posted on 17 September 2017
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Gentoo Linux Security Advisory GLSA 201709-04
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https://security.gentoo.org/
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Severity: Normal
Title: mod_gnutls: Certificate validation error
Date: September 17, 2017
Bugs: #541038
ID: 201709-04
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Synopsis
========
A vulnerability in mod_gnutls allows remote attackers to spoof clients
via crafted certificates.
Background
==========
mod_gnutls is an extension for =E2=80=8BApache's httpd. It uses the =E2=80==8BGnuTLS
library to provide HTTPS. It supports some protocols and features that
mod_ssl does not.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-apache/mod_gnutls < 0.7.3 >= 0.7.3
Description
===========
It was discovered that the authentication hook in mod_gnutls does not
validate client's certificates even when option "GnuTLSClientVerify" is
set to "require".
Impact
======
A remote attacker could present a crafted certificate and spoof clients
data.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All mod_gnutls users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_gnutls-0.7.3"
References
==========
[ 1 ] CVE-2015-2091
https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2091
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201709-04
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
=======
Copyright 2017 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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