Synopsis :

The remote Debian host is missing a security-related update.

Description :

Several vulnerabilities were discovered in lighttpd, a fast webserver
with minimal memory footprint, which could allow the execution of
arbitrary code via the overflow of CGI variables when mod_fcgi was
enabled. The Common Vulnerabilities and Exposures project identifies
the following problems :

- CVE-2007-3946
The use of mod_auth could leave to a denial of service
attack crashing the webserver.

- CVE-2007-3947
The improper handling of repeated HTTP headers could
cause a denial of service attack crashing the webserver.

- CVE-2007-3949
A bug in mod_access potentially allows remote users to
bypass access restrictions via trailing slash
characters.

- CVE-2007-3950
On 32-bit platforms users may be able to create denial
of service attacks, crashing the webserver, via
mod_webdav, mod_fastcgi, or mod_scgi.

See also :

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=434888
http://security-tracker.debian.org/tracker/CVE-2007-3946
http://security-tracker.debian.org/tracker/CVE-2007-3947
http://security-tracker.debian.org/tracker/CVE-2007-3949
http://security-tracker.debian.org/tracker/CVE-2007-3950
http://www.debian.org/security/2007/dsa-1362

Solution :

Upgrade the lighttpd package.

For the stable distribution (etch), these problems have been fixed in
version 1.4.13-4etch4.

Risk factor :

High / CVSS Base Score : 8.3
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C)
Public Exploit Available : true