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

Background
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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
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-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-apps/twiki < 20040902 >=3D 20040902=20

Description
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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
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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
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There is no known workaround at this time.

Resolution
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All TWiki users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=3Dwww-apps/twiki-20040902"

References
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[ 1 ] TWiki Security Alert
http://twiki.org/cgi-bin/view/Codev/...teCommandsWit=
hSearch
[ 2 ] CAN-2004-1037
http://cve.mitre.org/cgi-bin/cvename...DCAN-2004-1037

Availability
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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?
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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
http://bugs.gentoo.org.

License
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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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