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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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