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Lighttpd: Two Denials of Service


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200705-07 / lighttpd
Release Date May 07, 2007
Latest Revision May 07, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
www-servers/lighttpd < 1.4.14 >= 1.4.14 All supported architectures

Related bugreports: #174043


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

2.  Impact Information


Lighttpd is a lightweight HTTP web server.


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.


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.

3.  Resolution Information


There is no known workaround at this time.


All Lighttpd users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.4.14"

4.  References


Page updated May 07, 2007

Summary: This is a Gentoo Linux Security Advisory

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