U radu programskog paketa GnuTLS uočene su dvije sigurnosne ranjivosti. Moguće ih je iskoristiti za lažiranje proizvoljnih SSL poslužitelja i umetanje proizvoljnih podataka u HTTPS sjednice.

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Gentoo Linux Security Advisory                           GLSA 201110-05
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: GnuTLS: Multiple vulnerabilities
     Date: October 10, 2011
     Bugs: #281224, #292025
       ID: 201110-05

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Synopsis
========

Multiple vulnerabilities were found in GnuTLS, allowing for easier
man-in-the-middle attacks.

Background
==========

GnuTLS is an Open Source implementation of the TLS 1.2 and SSL 3.0
protocols.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-libs/gnutls              < 2.10.0                  >= 2.10.0

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

Multiple vulnerabilities have been discovered in GnuTLS. Please review
the CVE identifiers referenced below for details.

Impact
======

An attacker could perform man-in-the-middle attacks to spoof arbitrary
SSL servers via a crafted certificate issued by a legitimate
Certification Authority or to inject an arbitrary amount of chosen
plaintext into the beginning of the application protocol stream,
allowing for further exploitation.

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-2.10.0"

NOTE: This is a legacy GLSA. Updates for all affected architectures are
available since August 6, 2010. It is likely that your system is
already no longer affected by this issue.

References
==========

[ 1 ] CVE-2009-2730
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-2730
[ 2 ] CVE-2009-3555
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3555

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

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

 http://security.gentoo.org/glsa/glsa-201110-05.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
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https://bugs.gentoo.org.

License
=======

Copyright 2011 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