Microsoft IIS 4.0/5.0 Executable Files Parser privileges management

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft IIS 4.0/5.0. This issue affects some unknown processing of the component Executable Files Parser. Executing a manipulation can lead to privileges management. This vulnerability appears as CVE-2000-0886. The attack may be performed from remote. In addition, an exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft IIS 4.0/5.0 (Web Server). It has been declared as critical. This vulnerability affects an unknown functionality of the component Executable Files Parser. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

IIS 5.0 allows remote attackers to execute arbitrary commands via a malformed request for an executable file whose name is appended with operating system commands, aka the "Web Server File Request Parsing" vulnerability.

The weakness was presented 12/19/2000 by Georgi Guninski with Microsoft as MS00-086 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. This vulnerability was named CVE-2000-0886. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

It is possible to download the exploit 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 10632 (MS00-086: Webserver file request parsing (277873)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86228 (Microsoft IIS 4.0/5.0 Executable File Parsing Vulnerability (MS00-086)).

Applying the patch MS00-086 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. A possible mitigation has been published before and not just after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 3193. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1718.

The vulnerability is also documented in the databases at X-Force (5470), Exploit-DB (20384), Tenable (10632), SecurityFocus (BID 1912†) and Vulnerability Center (SBV-262†). See VDB-16106 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 10632
Nessus Name: MS00-086: Webserver file request parsing (277873)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS00-086

Snort ID: 3193
Snort Message: SERVER-IIS .cmd executable file parsing attack
Snort Class: 🔍

Suricata ID: 2103193
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

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

Timelineinfo

11/06/2000 🔍
11/06/2000 +0 days 🔍
12/19/2000 +43 days 🔍
12/19/2000 +0 days 🔍
12/19/2000 +0 days 🔍
03/12/2001 +83 days 🔍
11/26/2002 +624 days 🔍
07/01/2014 +4235 days 🔍
10/12/2025 +4121 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS00-086
Researcher: Georgi Guninski
Organization: Microsoft
Status: Confirmed

CVE: CVE-2000-0886 (🔍)
GCVE (CVE): GCVE-0-2000-0886
GCVE (VulDB): GCVE-100-16108

OVAL: 🔍

X-Force: 5470 - Microsoft Internet Information Service (IIS) invalid executable filename passing
SecurityFocus: 1912 - Microsoft IIS Executable File Parsing Vulnerability
Vulnerability Center: 262 - [MS00-086] IIS 5.0 Enables Arbitrary Code Execution via Improper File Request Parsing, Medium

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

Entryinfo

Created: 07/01/2014 17:15
Updated: 10/12/2025 08:55
Changes: 07/01/2014 17:15 (73), 05/05/2019 20:30 (15), 05/24/2025 16:57 (24), 10/12/2025 08:55 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!