GLSA 200905-04: GnuTLS: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	GnuTLS: Multiple vulnerabilities
Date:	05/24/2009
Bugs:	#267774
ID:	200905-04

Synopsis

Multiple vulnerabilities in GnuTLS might result in a Denial of Service, spoofing or the generation of invalid keys.

Background

GnuTLS is an Open Source implementation of the TLS 1.0 and SSL 3.0 protocols.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-libs/gnutls	< 2.6.6	>= 2.6.6	All supported architectures

Description

The following vulnerabilities were found in GnuTLS:

Miroslav Kratochvil reported that lib/pk-libgcrypt.c does not properly handle corrupt DSA signatures, possibly leading to a double-free vulnerability (CVE-2009-1415).
Simon Josefsson reported that GnuTLS generates RSA keys stored in DSA structures when creating a DSA key (CVE-2009-1416).
Romain Francoise reported that the _gnutls_x509_verify_certificate() function in lib/x509/verify.c does not perform time checks, resulting in the "gnutls-cli" program accepting X.509 certificates with validity times in the past or future (CVE-2009-1417).

Impact

A remote attacker could entice a user or automated system to process a specially crafted DSA certificate, possibly resulting in a Denial of Service condition. NOTE: This issue might have other unspecified impact including the execution of arbitrary code. Furthermore, a remote attacker could spoof signatures on certificates and the "gnutls-cli" application can be tricked into accepting an invalid certificate.

Workaround

There is no known workaround at this time.

Resolution

All GnuTLS users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.6.6"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200905-04.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.