[gentoo-announce] [ GLSA 200905-04 ] GnuTLS: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200905-04

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http://security.gentoo.org/

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Severity: Normal

Title: GnuTLS: Multiple vulnerabilities

Date: May 24, 2009

Bugs: #267774

ID: 200905-04

 

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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

-------------------------------------------------------------------

1 net-libs/gnutls < 2.6.6 >= 2.6.6

 

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

==========

 

[ 1 ] CVE-2009-1415

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1415

[ 2 ] CVE-2009-1416

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1416

[ 3 ] CVE-2009-1417

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1417

 

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 ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2009 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