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Gentoo Linux Security Advisory                           GLSA 201101-06
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: IO::Socket::SSL: Certificate validation error
      Date: January 16, 2011
      Bugs: #276360
        ID: 201101-06

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Synopsis
=======
An error in the hostname matching of IO::Socket::SSL might enable
remote attackers to conduct man-in-the-middle attacks.

Background
=========
IO::Socket::SSL is a Perl class implementing an object oriented
interface to SSL sockets.

Affected packages
================
    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  dev-perl/IO-Socket-SSL       < 1.26                       >= 1.26

Description
==========
The vendor reported that IO::Socket::SSL does not properly handle
Common Name (CN) fields.

Impact
=====
A remote attacker might employ a specially crafted certificate to
conduct man-in-the-middle attacks on SSL connections made using
IO::Socket::SSL.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All IO::Socket::SSL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-perl/IO-Socket-SSL-1.26"

References
=========
  [ 1 ] CVE-2009-3024
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3024

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

  https://security.gentoo.org/glsa/201101-06

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.

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.

https://creativecommons.org/licenses/by-sa/2.5/