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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
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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
[email protected] 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