From: Sune Kloppenborg Jeppesen (jaervoszgentoo.org)
Date: Wed Nov 24 2004 - 03:01:35 CST

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Gentoo Linux Security Advisory GLSA 200411-33
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                                            http://security.gentoo.org/
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  Severity: High
     Title: TWiki: Arbitrary command execution
      Date: November 24, 2004
      Bugs: #71035
        ID: 200411-33

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Synopsis
========

A bug in the TWiki search function allows an attacker to execute
arbitrary commands with the permissions of the user running TWiki.

Background
==========

TWiki is a Web-based groupware tool based around the concept of wiki
pages that can be edited by anybody with a Web browser.

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

    -------------------------------------------------------------------
     Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
  1 www-apps/twiki < 20040902 >= 20040902

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

The TWiki search function, which uses a shell command executed via the
Perl backtick operator, does not properly escape shell metacharacters
in the user-provided search string.

Impact
======

An attacker can insert malicious commands into a search request,
allowing the execution of arbitrary commands with the privileges of the
user running TWiki (usually the Web server user).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All TWiki users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-apps/twiki-20040902"

References
==========

  [ 1 ] TWiki Security Alert
        http://twiki.org/cgi-bin/view/Codev/SecurityAlertExecuteCommandsWithSearch
  [ 2 ] CAN-2004-1037
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1037

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

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

  http://security.gentoo.org/glsa/glsa-200411-33.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
securitygentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 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/2.0

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