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Lighttpd: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200708-11 / lighttpd
Release Date August 16, 2007
Latest Revision August 16, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
www-servers/lighttpd < 1.4.16 >= 1.4.16 All supported architectures

Related bugreports: #185442


Several vulnerabilities were reported in Lighttpd, most of them allowing a Denial of Service and potentially the remote execution of arbitrary code.

2.  Impact Information


Lighttpd is a lightweight HTTP web server.


Stefan Esser discovered errors with evidence of memory corruption in the code parsing the headers. Several independent researchers also reported errors involving the handling of HTTP headers, the mod_auth and mod_scgi modules, and the limitation of active connections.


A remote attacker can trigger any of these vulnerabilities by sending malicious data to the server, which may lead to a crash or memory exhaustion, and potentially the execution of arbitrary code. Additionally, access-deny settings can be evaded by appending a final / to a URL.

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-1.4.16"

4.  References


Page updated August 16, 2007

Summary: This is a Gentoo Linux Security Advisory

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