Microsoft IIS 4.0 /IISADMPWD privileges management

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Microsoft IIS 4.0. Impacted is an unknown function of the file /IISADMPWD. Such manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-1999-0407. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft IIS 4.0 (Web Server). Affected by this issue is some unknown functionality of the file /IISADMPWD. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

By default, IIS 4.0 has a virtual directory /IISADMPWD which contains files that can be used as proxies for brute force password attacks, or to identify valid users on the system.

The weakness was disclosed 02/09/1999 by David Litchfield (nemo) as not defined posting (Bugtraq). The advisory is shared for download at marc.theaimsgroup.com. This vulnerability is handled as CVE-1999-0407. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 10371 (Microsoft IIS /iisadmpwd/aexp2.htr Password Policy Bypass), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86045 (Microsoft IIS iisadmpwd Web Directory Present Vulnerability).

Upgrading to version 5.0 eliminates this vulnerability. Attack attempts may be identified with Snort ID 991. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1061.

The vulnerability is also documented in the databases at X-Force (3279), Tenable (10371), SecurityFocus (BID 2110†) and Vulnerability Center (SBV-13†). The entry VDB-18497 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10371
Nessus Name: Microsoft IIS /iisadmpwd/aexp2.htr Password Policy Bypass
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: IIS 5.0

Snort ID: 991
Snort Message: SERVER-IIS achg.htr access
Snort Class: 🔍

Suricata ID: 2101487
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍
SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

02/09/1998 🔍
02/09/1999 +365 days 🔍
02/09/1999 +0 days 🔍
02/09/1999 +0 days 🔍
04/15/2000 +431 days 🔍
10/08/2002 +906 days 🔍
06/20/2014 +4273 days 🔍
04/18/2026 +4320 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: marc.theaimsgroup.com
Researcher: David Litchfield (nemo)
Status: Confirmed

CVE: CVE-1999-0407 (🔍)
GCVE (CVE): GCVE-0-1999-0407
GCVE (VulDB): GCVE-100-14492
X-Force: 3279
SecurityFocus: 2110 - Microsoft IIS 4.0 IISADMPWD Proxied Password Attack
Vulnerability Center: 13 - IIS 4.0 Reveals User Names and Passwords, Medium

See also: 🔍

Entryinfo

Created: 06/20/2014 16:37
Updated: 04/18/2026 12:17
Changes: 06/20/2014 16:37 (78), 05/04/2019 16:32 (4), 04/18/2026 12:17 (18)
Complete: 🔍
Cache ID: 216::103

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