[ GLSA 201003-01 ] sudo: Privilege escalation

[Alex Legler <a3li () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 201003-01
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                                            http://security.gentoo.org/
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  Severity: High
     Title: sudo: Privilege escalation
      Date: March 03, 2010
      Bugs: #306865
        ID: 201003-01

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Synopsis
========

Two vulnerabilities in sudo might allow local users to escalate
privileges and execute arbitrary code with root 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     < 1.7.2_p4                         >= 1.7.2_p4

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

Multiple vulnerabilities have been discovered in sudo:

* Glenn Waller and neonsignal reported that sudo does not properly
  handle access control of the "sudoedit" pseudo-command
  (CVE-2010-0426).

* Harald Koenig reported that sudo does not properly set
  supplementary groups when using the "runas_default" option
  (CVE-2010-0427).

Impact
======

A local attacker with privileges to use "sudoedit" or the privilege to
execute commands with the "runas_default" setting enabled could
leverage these vulnerabilities to execute arbitrary code with elevated
privileges.

Workaround
==========

CVE-2010-0426: Revoke all "sudoedit" privileges, or use the full path
to sudoedit. CVE-2010-0427: Remove all occurrences of the
"runas_default" setting.

Resolution
==========

All sudo users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.7.2_p4"

References
==========

  [ 1 ] CVE-2010-0426
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0426
  [ 2 ] CVE-2010-0427
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0427

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

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

  http://security.gentoo.org/glsa/glsa-201003-01.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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