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TITLE:
lighttpd mod_fastcgi PHP Header Overflow

SECUNIA ADVISORY ID:
SA26732

VERIFY ADVISORY:
http://secunia.com/advisories/26732/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
lighttpd 1.x
http://secunia.com/product/4661/

DESCRIPTION:
Mattias Bengtsson and Philip Olausson have reported a vulnerability
in lighttpd, which can be exploited by malicious people to compromise
a vulnerable system.

The vulnerability is caused due to an error in the mod_fastcgi
extension when handling headers in a HTTP request. This can be
exploited to e.g. add or replace PHP headers (e.g. SCRIPT_FILENAME)
via a HTTP request containing an overly long header.

Successful exploitation allows execution of arbitrary PHP code.

The vulnerability affects versions prior to 1.4.18.

SOLUTION:
Update to version 1.4.18.

PROVIDED AND/OR DISCOVERED BY:
Mattias Bengtsson and Philip Olausson, SECWEB

ORIGINAL ADVISORY:
SECWEB:
http://secweb.se/en/advisories/lighttpd-fastcgi-remote-vulnerability/

lighttpd:
http://www.lighttpd.net/assets/2007/9/9/lighttpd_sa_2007_12.txt

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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