||Home : Advisories : Directory Traversal Possible & Denial of Service in Worm HTTP Server|
||Directory Traversal Possible & Denial of Service in Worm HTTP Server
||25th August 2000
Delphis Consulting Plc
Security Team Advisories
Adv : DST2K0023
Title : Directory Traversal Possible & Denial of Service in Worm
Author : DCIST (firstname.lastname@example.org)
O/S : Microsoft Windows NT v4.0 Workstation (SP6)
Product : Worm HTTP Server v1.0
Date : 25/08/2000
Vendor URL: http://www.wormonline.com/software.htm
Delphis Consulting Internet Security Team (DCIST) discovered the following
vulnerabilities in Worm HTTP Server under Windows NT.
It is possible to cause a denial of service by passing a very log filename
in the url. This causes the Worm HTTP server to crash with a 'runtime error'
causeing denial of service.
It is possible to traverse directories lower than the web root by knowing
the exact path and filename of the file you wish to retrieve. This is
done by executing the double-dot-bug similar to other web servers.
Vendor Status: Informed
The work around for the directory traversal exploit will only work under
WindowsNT. Due to the fact that the Worm HTTP server runs as the useraccount
which started it allows you to set appropriate NTFS permissions to limit the
files the webserver is able to access.
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