GLSA 201709-04: mod_gnutls: Certificate validation error

http://security.gentoo.org/

Severity:	normal
Title:	mod_gnutls: Certificate validation error
Date:	09/17/2017
Bugs:	#541038
ID:	201709-04

Synopsis

A vulnerability in mod_gnutls allows remote attackers to spoof clients via crafted certificates.

Background

mod_gnutls is an extension for Apache’s httpd. It uses the GnuTLS library to provide HTTPS. It supports some protocols and features that mod_ssl does not.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
www-apache/mod_gnutls	< 0.7.3	>= 0.7.3	All supported architectures

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

CVE-2015-2091

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201709-04.xml

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.