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Gentoo Linux Security Advisory - Lighttpd: Two Denials of Service (GLSA 200705-07)
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Gentoo Linux Security Advisory                           GLSA 200705-07
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Lighttpd: Two Denials of Service
      Date: May 07, 2007
      Bugs: #174043
        ID: 200705-07

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Synopsis
========

Two vulnerabilities have been discovered in Lighttpd, each allowing for
a Denial of Service.

Background
==========

Lighttpd is a lightweight HTTP web server.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  www-servers/lighttpd      < 1.4.14                      >= 1.4.14

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

Robert Jakabosky discovered an infinite loop triggered by a connection
abort when Lighttpd processes carriage return and line feed sequences.
Marcus Rueckert discovered a NULL pointer dereference when a server
running Lighttpd tries to access a file with a mtime of 0.

Impact
======

A remote attacker could upload a specially crafted file to the server
or send a specially crafted request and then abort the connection,
possibly resulting in a crash or a Denial of Service by CPU
consumption.

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-1.4.14"

References
==========

  [ 1 ] CVE-2007-1869
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1869
  [ 2 ] CVE-2007-1870
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1870

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

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

  http://security.gentoo.org/glsa/glsa-200705-07.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 2007 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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