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Gentoo Linux Security Advisory                           GLSA 201507-16
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Portage: Man-in-the-middle attack
     Date: July 10, 2015
     Bugs: #469888
       ID: 201507-16

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Synopsis
=======
A vulnerability in Portage's urlopen function could allow a remote
attacker to conduct a man-in-the-middle attack.

Background
=========
Portage is the package management and distribution system for Gentoo.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-apps/portage            < 2.1.12.2               >= 2.1.12.2 

Description
==========
Portage does not verify X.509 SSL certificate properly if HTTPS is
used.

Impact
=====
A remote attacker can spoof servers and modify binary package lists via
specially crafted certificate.

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

Resolution
=========
All Portage users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/portage-2.1.12.2"

References
=========
[ 1 ] CVE-2013-2100
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2100

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

 https://security.gentoo.org/glsa/201507-16

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 2015 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/