[ GLSA 201009-03 ] sudo: Privilege Escalation

[Alex Legler <a3li () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 201009-03
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                                            http://security.gentoo.org/
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  Severity: High
     Title: sudo: Privilege Escalation
      Date: September 07, 2010
      Bugs: #322517, #335381
        ID: 201009-03

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Synopsis
========

The secure path feature and group handling in sudo allow local
attackers to escalate privileges.

Background
==========

sudo allows a system administrator to give users the ability to run
commands as other users.

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

    -------------------------------------------------------------------
     Package         /    Vulnerable    /                   Unaffected
    -------------------------------------------------------------------
  1  app-admin/sudo      < 1.7.4_p3-r1                  >= 1.7.4_p3-r1

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

Multiple vulnerabilities have been reported in sudo:

* Evan Broder and Anders Kaseorg of Ksplice, Inc. reported that the
  sudo 'secure path' feature does not properly handle multiple PATH
  variables (CVE-2010-1646).

* Markus Wuethrich of Swiss Post reported that sudo fails to restrict
  access when using Runas groups and the group (-g) command line option
  (CVE-2010-2956).

Impact
======

A local attacker could exploit these vulnerabilities to gain the
ability to run certain commands with the privileges of other users,
including root, depending on the configuration.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All sudo users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.7.4_p3-r1"

References
==========

  [ 1 ] CVE-2010-1646
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-1646
  [ 2 ] CVE-2010-2956
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-2956

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

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

  http://security.gentoo.org/glsa/glsa-201009-03.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
security () gentoo org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2010 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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