Microsoft IIS /iisadmpwd/aexp2.htr Password Policy Bypass

This script is Copyright (C) 2000-2015 Tenable Network Security, Inc.

Synopsis :

The remote web server is affected by a password policy bypass

Description :

Microsoft IIS installs the 'aexp2.htr', 'aexp2b.htr', 'aexp3.htr', or
'aexp4.htr' files in the '/iisadmpwd' directory by default. These
fiels can be used by an attacker to brute-force a valid
username/password. A valid user may also use it to change his password
on a locked account, bypassing password policy.

See also :

Solution :

Remote the HTR ISAPI filter mapping from IIS and use Microsoft Active
Directory Service Interfaces for handling accounts remotely.

Risk factor :

Critical / CVSS Base Score : 10.0
CVSS Temporal Score : 8.5

Family: Web Servers

Nessus Plugin ID: 10371 (iis_authentification_manager.nasl)

Bugtraq ID: 2110

CVE ID: CVE-1999-0407