Microsoft IIS Source Fragment Disclosure

This script is Copyright (C) 2001-2013 Pedro Antonio Nieto Feijoo


Synopsis :

The remote web server is affected by an information disclosure
vulnerability.

Description :

Microsoft IIS 4.0 and 5.0 can be made to disclose fragments of source
code which should otherwise be inaccessible. This is done by appending
'+.htr' to a request for a known '.asp' (or '.asa', '.ini', 'etc')
file.

See also :

http://technet.microsoft.com/en-us/security/bulletin/ms01-004

Solution :

.htr script mappings should be removed if not required.

- open Internet Services Manager
- right click on the web server and select properties
- select WWW service | Edit | Home Directory | Configuration
- remove the application mappings reference to .htr

If .htr functionality is required, install the relevant patches
from Microsoft (MS01-004).

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N)
CVSS Temporal Score : 3.7
(CVSS2#E:U/RL:OF/RC:C)

Family: Web Servers

Nessus Plugin ID: 10680 (iis_frag_disclosure.nasl)

Bugtraq ID: 1193
1488

CVE ID: CVE-2000-0457
CVE-2000-0630