Microsoft IIS 4.0 Chunked Transfer Encoding POST/PUT Request memory corruption

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.
7.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Microsoft IIS 4.0. Affected by this vulnerability is an unknown functionality of the component Chunked Transfer Encoding Handler. Executing a manipulation as part of POST/PUT Request can lead to memory corruption. This vulnerability is registered as CVE-2000-0226. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical was found in Microsoft IIS 4.0 (Web Server). This vulnerability affects an unknown function of the component Chunked Transfer Encoding Handler. The manipulation as part of a POST/PUT Request leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

IIS 4.0 allows attackers to cause a denial of service by requesting a large buffer in a POST or PUT command which consumes memory, aka the "Chunked Transfer Encoding Buffer Overflow Vulnerability."

The weakness was published 03/20/2000 with Microsoft as MS00-018 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. This vulnerability was named CVE-2000-0226. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 10937 (Microsoft IIS Multiple Remote DoS (MS02-018 / Q319733)), 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 86398 (Microsoft IIS 4.0 Chunked Transfer Encoding Buffer Overflow Vulnerability (MS00-018)).

Applying the patch MS00-018 is able to eliminate this problem. The bugfix is ready for download at microsoft.com.

The vulnerability is also documented in the databases at X-Force (4117), Tenable (10937), SecurityFocus (BID 1066†) and Vulnerability Center (SBV-776†). Similar entry is available at VDB-18068. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

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
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 10937
Nessus Name: Microsoft IIS Multiple Remote DoS (MS02-018 / Q319733)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS00-018
McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

03/20/2000 🔍
03/20/2000 +0 days 🔍
03/20/2000 +0 days 🔍
03/20/2000 +0 days 🔍
04/11/2002 +752 days 🔍
02/02/2003 +297 days 🔍
06/23/2014 +4159 days 🔍
10/18/2025 +4135 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS00-018
Researcher: Discovered by Petteri Stenius, publicized in Microsoft Security Bulletin (MS00-018) released on March 20, 2000.
Organization: Microsoft
Status: Confirmed

CVE: CVE-2000-0226 (🔍)
GCVE (CVE): GCVE-0-2000-0226
GCVE (VulDB): GCVE-100-15400
X-Force: 4117
SecurityFocus: 1066 - Microsoft IIS 4.0 Chunked Transfer Encoding Buffer Overflow Vulnerability
Vulnerability Center: 776 - [MS00-018] Buffer Overflow in Microsoft IIS 4.0 Chunked Transfer Encoding, High

See also: 🔍

Entryinfo

Created: 06/24/2014 00:40
Updated: 10/18/2025 10:18
Changes: 06/24/2014 00:40 (74), 10/08/2020 15:05 (1), 10/18/2025 10:18 (18)
Complete: 🔍
Cache ID: 216:D8B:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!