GLSA 200502-21: lighttpd: Script source disclosure

http://security.gentoo.org/

Severity:	low
Title:	lighttpd: Script source disclosure
Date:	02/15/2005
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
www-servers/lighttpd	< 1.3.10-r1	>= 1.3.10-r1	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:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/lighttpd-1.3.10-r1"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200502-21.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 https://bugs.gentoo.org.