[Full-disclosure] [ GLSA 200804-08 ] lighttpd: Multiple vulnerabilities

[Tobias Heinlein]

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Gentoo Linux Security Advisory                           GLSA 200804-08
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: lighttpd: Multiple vulnerabilities
      Date: April 10, 2008
      Bugs: #212930, #214892
        ID: 200804-08

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Synopsis
========

Multiple vulnerabilities in lighttpd may lead to information disclosure
or a Denial of Service.

Background
==========

lighttpd is a lightweight high-performance web server.

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

    -------------------------------------------------------------------
     Package               /   Vulnerable   /               Unaffected
    -------------------------------------------------------------------
  1  www-servers/lighttpd      < 1.4.19-r2                >= 1.4.19-r2

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

Julien Cayzax discovered that an insecure default setting exists in
mod_userdir in lighttpd. When userdir.path is not set the default value
used is $HOME. It should be noted that the "nobody" user's $HOME is "/"
(CVE-2008-1270). An error also exists in the SSL connection code which
can be triggered when a user prematurely terminates his connection
(CVE-2008-1531).

Impact
======

A remote attacker could exploit the first vulnerability to read
arbitrary files. The second vulnerability can be exploited by a remote
attacker to cause a Denial of Service by terminating a victim's SSL
connection.

Workaround
==========

As a workaround for CVE-2008-1270 you can set userdir.path to a
sensible value, e.g. "public_html".

Resolution
==========

All lighttpd users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.4.19-r2"

References
==========

  [ 1 ] CVE-2008-1270
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1270
  [ 2 ] CVE-2008-1531
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1531

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

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

  http://security.gentoo.org/glsa/glsa-200804-08.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 at gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 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/2.5

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