[Full-Disclosure] [ GLSA 200501-39 ] SquirrelMail: Multiple vulnerabilities

From: Sune Kloppenborg Jeppesen (jaervosz_at_gentoo.org)
Date: 01/28/05

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    To: gentoo-announce@gentoo.org
Date: Fri, 28 Jan 2005 15:46:32 +0100

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    Gentoo Linux Security Advisory GLSA 200501-39
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                                                http://security.gentoo.org/
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      Severity: High
         Title: SquirrelMail: Multiple vulnerabilities
          Date: January 28, 2005
          Bugs: #78116
            ID: 200501-39

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    Synopsis
    ========

    SquirrelMail fails to properly sanitize user input, which could lead to
    arbitrary code execution and compromise webmail accounts.

    Background
    ==========

    SquirrelMail is a webmail package written in PHP. It supports IMAP and
    SMTP and can optionally be installed with SQL support.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 mail-client/squirrelmail <= 1.4.3a-r2 >= 1.4.4

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

    SquirrelMail fails to properly sanitize certain strings when decoding
    specially-crafted strings, which can lead to PHP file inclusion and
    XSS.

    * Insufficient checking of incoming URLs in prefs.php (CAN-2005-0075)
      and in webmail.php (CAN-2005-0103).

    * Insufficient escaping of integers in webmail.php (CAN-2005-0104).

    Impact
    ======

    By sending a specially-crafted URL, an attacker can execute arbitrary
    code from the local system with the permissions of the web server.
    Furthermore by enticing a user to load a specially-crafted URL, it is
    possible to display arbitrary remote web pages in Squirrelmail's
    frameset and execute arbitrary scripts running in the context of the
    victim's browser. This could lead to a compromise of the user's webmail
    account, cookie theft, etc.

    Workaround
    ==========

    The arbitrary code execution is only possible with "register_globals"
    set to "On". Gentoo ships PHP with "register_globals" set to "Off" by
    default. There are no known workarounds for the other issues at this
    time.

    Resolution
    ==========

    All SquirrelMail users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=mail-client/squirrelmail-1.4.4"

    Note: Users with the vhosts USE flag set should manually use
    webapp-config to finalize the update.

    References
    ==========

      [ 1 ] SquirrelMail Advisory
            http://sourceforge.net/mailarchive/message.php?msg_id=10628451
      [ 2 ] CAN-2005-0075
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0075
      [ 3 ] CAN-2005-0103
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0103
      [ 4 ] CAN-2005-0104
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0104

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

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

      http://security.gentoo.org/glsa/glsa-200501-39.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 2005 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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