Microsoft IIS 4.0/5.0 HTR Request ISM.DLL privileges management

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft IIS 4.0/5.0. It has been declared as critical. This vulnerability affects unknown code in the library ISM.DLL of the component HTR Request Handler. The manipulation results in privileges management. This vulnerability is identified as CVE-2000-0457. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft IIS 4.0/5.0 (Web Server). Affected is some unknown processing in the library ISM.DLL of the component HTR Request Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

ISM.DLL in IIS 4.0 and 5.0 allows remote attackers to read file contents by requesting the file and appending a large number of encoded spaces (%20) and terminated with a .htr extension, aka the ".HTR File Fragment Reading" or "File Fragment Reading via .HTR" vulnerability.

The weakness was released 05/11/2000 by Security Team with Microsoft as not defined posting (Bugtraq). The advisory is available at marc.theaimsgroup.com. This vulnerability is traded as CVE-2000-0457. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 10680 (Microsoft IIS Source Fragment Disclosure), 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.

Upgrading eliminates this vulnerability. Attack attempts may be identified with Snort ID 1021. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1164.

The vulnerability is also documented in the databases at X-Force (4448), Exploit-DB (19908), Tenable (10680), SecurityFocus (BID 1193†) and Vulnerability Center (SBV-159†). Entry connected to this vulnerability is available at VDB-15770. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10680
Nessus Name: Microsoft IIS Source Fragment Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 10680
OpenVAS Name: Test Microsoft IIS Source Fragment Disclosure
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Snort ID: 1021
Snort Message: SERVER-IIS ism.dll attempt
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

05/11/2000 🔍
05/11/2000 +0 days 🔍
05/11/2000 +0 days 🔍
05/11/2000 +0 days 🔍
05/29/2001 +383 days 🔍
10/20/2002 +509 days 🔍
06/24/2014 +4265 days 🔍
05/24/2025 +3987 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: marc.theaimsgroup.com
Researcher: Security Team
Organization: Microsoft
Status: Confirmed

CVE: CVE-2000-0457 (🔍)
GCVE (CVE): GCVE-0-2000-0457
GCVE (VulDB): GCVE-100-15546
X-Force: 4448
SecurityFocus: 1193 - Microsoft IIS 4.0/5.0 Malformed Filename Request Vulnerability
Vulnerability Center: 159 - [MS00-044] Microsoft IIS 4.0 and 5.0 Reveal Source Code via URL with .htr Appended, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/24/2014 16:29
Updated: 05/24/2025 17:51
Changes: 06/24/2014 16:29 (83), 05/05/2019 10:35 (1), 05/24/2025 17:51 (27)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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