[gentoo-announce] [ GLSA 200901-10 ] GnuTLS: Certificate validation error

[news 28]

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Gentoo Linux Security Advisory GLSA 200901-10

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~ http://security.gentoo.org/

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~ Severity: Normal

~ Title: GnuTLS: Certificate validation error

~ Date: January 14, 2009

~ Bugs: #245850

~ ID: 200901-10

 

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Synopsis

========

 

A certificate validation error in GnuTLS might allow for spoofing

attacks.

 

Background

==========

 

GnuTLS is an open-source implementation of TLS 1.0 and SSL 3.0.

 

Affected packages

=================

 

~ -------------------------------------------------------------------

~ Package / Vulnerable / Unaffected

~ -------------------------------------------------------------------

~ 1 net-libs/gnutls < 2.4.1-r2 >= 2.4.1-r2

 

Description

===========

 

Martin von Gagern reported that the _gnutls_x509_verify_certificate()

function in lib/x509/verify.c trusts certificate chains in which the

last certificate is an arbitrary trusted, self-signed certificate.

 

Impact

======

 

A remote attacker could exploit this vulnerability and spoof arbitrary

names to conduct Man-In-The-Middle attacks and intercept sensitive

information.

 

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-2.4.1-r2"

 

References

==========

 

~ [ 1 ] CVE-2008-4989

~ http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4989

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

~ http://security.gentoo.org/glsa/glsa-200901-10.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

 

 

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