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

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Date: Thu, 10 Apr 2008 17:39:28 +0200
From: Tobias Heinlein <keytoaster@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200804-08 ] lighttpd: Multiple
	vulnerabilities

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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@...too.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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