[Full-Disclosure] [ GLSA 200502-21 ] lighttpd: Script source disclosure

From: Thierry Carrez (koon_at_gentoo.org)
Date: 02/15/05

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To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200502-21
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                                                http://security.gentoo.org/
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      Severity: Low
         Title: lighttpd: Script source disclosure
          Date: February 15, 2005
          Bugs: #81776
            ID: 200502-21

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    Synopsis
    ========

    An attacker can trick lighttpd into revealing the source of scripts
    that should be executed as CGI or FastCGI applications.

    Background
    ==========

    lighttpd is a small-footprint, fast, compliant and very flexible
    web-server which is optimized for high-performance environments.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 www-servers/lighttpd < 1.3.10-r1 >= 1.3.10-r1

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

    lighttpd uses file extensions to determine which elements are programs
    that should be executed and which are static pages that should be sent
    as-is. By appending %00 to the filename, you can evade the extension
    detection mechanism while still accessing the file.

    Impact
    ======

    A remote attacker could send specific queries and access the source of
    scripts that should have been executed as CGI or FastCGI applications.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All lighttpd users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.3.10-r1"

    References
    ==========

      [ 1 ] lighttpd-announce Advisory
            http://article.gmane.org/gmane.comp.web.lighttpd/1171

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

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

      http://security.gentoo.org/glsa/glsa-200502-21.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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