Detalji

Uočen je novi sigurnosni nedostatak vezan uz IO::Socket::SSL. Radi se o modulu koji se koristi kao zamjena za modul "IO::Socket::INET", a omogućuje SSL (eng. Secure Sockets Layer) kriptiranje podataka prije njihovog prenošenja na udaljeni poslužitelj ili klijent. Problem je uzrokovan pogreškom u radu funkcije "verify_hostname_of_cert()". Udaljenom napadaču omogućuje zaobilaženje pojedinih provjera te izvođenje MITM (eng. man-in-the-middle) napada. Korisnicima se preporuča instalacija nadogradnje. 

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Gentoo Linux Security Advisory                           GLSA 201101-06
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                                            http://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:

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

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