Microsoft IIS 4.0/5.0 HTR Request heap-based overflow

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

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft IIS 4.0/5.0. Affected by this vulnerability is an unknown functionality of the component HTR Request Handler. The manipulation results in heap-based overflow. This vulnerability was named CVE-2002-0364. There is no available exploit. 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 classified as critical. Affected is an unknown functionality of the component HTR Request Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the chunked encoding transfer mechanism in IIS 4.0 and 5.0 allows attackers to execute arbitrary code via the processing of HTR request sessions, aka "Heap Overrun in HTR Chunked Encoding Could Enable Web Server Compromise."

The weakness was presented 07/03/2002 by Riley Hassell (DiGiT) with Next Generation Security Software as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability is traded as CVE-2002-0364. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 11028 (Microsoft IIS .HTR Filter Multiple Overflows (MS02-028)), 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 10684 (Microsoft IIS HTR ISAPI Extension Heap Overflow Vulnerability).

Applying a patch is able to eliminate this problem. Attack attempts may be identified with Snort ID 1806. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1272.

The vulnerability is also documented in the databases at X-Force (9327), Tenable (11028), SecurityFocus (BID 4855†) and Vulnerability Center (SBV-931†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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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: Heap-based overflow
CWE: CWE-122 / CWE-119
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: 11028
Nessus Name: Microsoft IIS .HTR Filter Multiple Overflows (MS02-028)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Saint ID: exploit_info/iis_htr_isapi
Saint Name: Microsoft IIS .HTR ISAPI chunked encoding buffer overflow

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍
Snort ID: 1806
Snort Message: SERVER-IIS .htr chunked Transfer-Encoding
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

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

Timelineinfo

05/27/2002 🔍
06/13/2002 +17 days 🔍
07/03/2002 +20 days 🔍
07/03/2002 +0 days 🔍
07/03/2002 +0 days 🔍
02/10/2003 +222 days 🔍
07/11/2014 +4169 days 🔍
09/19/2025 +4087 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: kb.cert.org
Researcher: Riley Hassell (DiGiT)
Organization: Next Generation Security Software
Status: Confirmed

CVE: CVE-2002-0364 (🔍)
GCVE (CVE): GCVE-0-2002-0364
GCVE (VulDB): GCVE-100-18348

OVAL: 🔍

CERT: 🔍
X-Force: 9327
SecurityFocus: 4855 - Microsoft IIS HTR Chunked Encoding Transfer Heap Overflow Vulnerability
Vulnerability Center: 931 - [MS02-028] Microsoft IIS HTR Chunked Encoding Transfer Heap Overflow Vulnerability, High

Entryinfo

Created: 07/11/2014 14:18
Updated: 09/19/2025 00:33
Changes: 07/11/2014 14:18 (80), 05/09/2019 16:24 (2), 01/21/2025 07:48 (17), 09/19/2025 00:33 (2)
Complete: 🔍
Cache ID: 216::103

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