[ GLSA 200502-21 ] lighttpd: Script source disclosure

[GLSA]

Gentoo Linux Security Advisory

Title: lighttpd: Script source disclosure (GLSA 200502-21)
Severity: low
Exploitable: remote
Date: February 15, 2005
Updated: May 22, 2006
Bug(s): #81776
ID: 200502-21

Synopsis

An attacker can trick lighttpd into revealing the source of scripts that should be executed as CGI or FastCGI applications.

Background

lighttpd is a small-footprint, fast, compliant and very flexible web-server which is optimized for high-performance environments.

Affected Packages

Package: www-servers/lighttpd
Vulnerable: < 1.3.10-r1
Unaffected: >= 1.3.10-r1
Architectures: All supported architectures


Description

lighttpd uses file extensions to determine which elements are programs that should be executed and which are static pages that should be sent as-is. By appending %00 to the filename, you can evade the extension detection mechanism while still accessing the file.

Impact

A remote attacker could send specific queries and access the source of scripts that should have been executed as CGI or FastCGI applications.

Workaround

There is no known workaround at this time.

Resolution

All lighttpd users should upgrade to the latest version: