Ispravljena su 3 nedostatka paketa PolicyKit koja lokalni napadač može zlouporabiti za dobivanje većih privilegija ili otkrivanje osjetljivih informacija.

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Gentoo Linux Security Advisory                           GLSA 201204-06
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                                            http://security.gentoo.org/
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 Severity: High
    Title: PolicyKit: Multiple vulnerabilities
     Date: April 17, 2012
     Bugs: #314535, #364973, #401513
       ID: 201204-06

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Synopsis
========

Multiple vulnerabilities have been found in PolicyKit, the worst of
which may allow a local attacker to gain root privileges.

Background
==========

PolicyKit is a toolkit for controlling privileges for system-wide
services.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-auth/polkit             < 0.104-r1               >= 0.104-r1

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

Multiple vulnerabilities have been found in PolicyKit:

* Error messages in the pkexec utility disclose the existence of local
  files (CVE-2010-0750).
* The pkexec utility initially checks the effective user ID of its
  parent process for authorization, instead of checking the real user
  ID (CVE-2011-1485).
* Members of the "wheel" group are able to execute commands as an
  administrator without a password (CVE-2011-4945).

Impact
======

A local attacker could gain elevated privileges or sensitive
information.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PolicyKit users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-auth/polkit-0.104-r1"

References
==========

[ 1 ] CVE-2010-0750
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-0750
[ 2 ] CVE-2011-1485
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-1485
[ 3 ] CVE-2011-4945
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4945

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

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

 http://security.gentoo.org/glsa/glsa-201204-06.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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License
=======

Copyright 2012 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