[Full-Disclosure] [ GLSA 200411-33 ] TWiki: Arbitrary command execution

From: Sune Kloppenborg Jeppesen (jaervosz_at_gentoo.org)
Date: 11/24/04

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    To: gentoo-announce@gentoo.org
Date: Wed, 24 Nov 2004 10:01:35 +0100

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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
    security@gentoo.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

    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

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