[ GLSA 200505-04 ] GnuTLS: Denial of Service vulnerability

[Matthias Geerdsen <vorlon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200505-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: GnuTLS: Denial of Service vulnerability
      Date: May 09, 2005
      Bugs: #90726
        ID: 200505-04

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Synopsis
========

The GnuTLS library is vulnerable to Denial of Service attacks.

Background
==========

GnuTLS is a free TLS 1.0 and SSL 3.0 implementation for the GNU
project.

Affected packages
=================

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-libs/gnutls       < 1.2.3                            >= 1.2.3
                                                            *>= 1.0.25

Description
===========

A vulnerability has been discovered in the record packet parsing in the
GnuTLS library. Additionally, a flaw was also found in the RSA key
export functionality.

Impact
======

A remote attacker could exploit this vulnerability and cause a Denial
of Service to any application that utilizes the GnuTLS library.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GnuTLS users should remove the existing installation and upgrade to
the latest version:

    # emerge --sync
    # emerge --unmerge gnutls
    # emerge --ask --oneshot --verbose net-libs/gnutls

Due to small API changes with the previous version, please do the
following to ensure your applications are using the latest GnuTLS that
you just emerged.

    # revdep-rebuild --soname-regexp libgnutls.so.1[0-1]

Previously exported RSA keys can be fixed by executing the following
command on the key files:

    # certtool -k infile outfile

References
==========

  [ 1 ] GnuTLS Announcement
        http://lists.gnupg.org/pipermail/gnutls-dev/2005-April/000858.html
  [ 2 ] CAN-2005-1431
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1431

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200505-04.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
http://bugs.gentoo.org.

License
=======

Copyright 2005 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/2.0

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