Apache Tomcat 4.0.3 Request denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Apache Tomcat 4.0.3. The affected element is an unknown function of the component Request Handler. This manipulation causes denial of service. This vulnerability is handled as CVE-2002-0935. The attack can be initiated remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Tomcat 4.0.3 (Application Server Software). It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component Request Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Apache Tomcat 4.0.3, and possibly other versions before 4.1.3 beta, allows remote attackers to cause a denial of service (resource exhaustion) via a large number of requests to the server with null characters, which causes the working threads to hang.

The weakness was released 06/20/2002 by Peter Gründl (Website). It is possible to read the advisory at archives.neohapsis.com. This vulnerability is known as CVE-2002-0935. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but an exploit is available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 49702 (Apache Tomcat 4.x < 4.1.3 Denial of Service), 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 86356 (Apache Tomcat Null Character Malformed Request Denial of Service Vulnerability).

Upgrading to version 4.0.3 or 4.1.3 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (9396), Tenable (49702), SecurityFocus (BID 5067†), OSVDB (5051†) and Vulnerability Center (SBV-937†). Entry connected to this vulnerability is available at VDB-18872. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 49702
Nessus Name: Apache Tomcat 4.x < 4.1.3 Denial of Service
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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0-Day Time: 🔍
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Exploit Delay Time: 🔍

Upgrade: Tomcat 4.0.3/4.1.3

Timelineinfo

06/20/2002 🔍
06/20/2002 +0 days 🔍
06/20/2002 +0 days 🔍
08/30/2002 +71 days 🔍
10/04/2002 +35 days 🔍
10/04/2002 +0 days 🔍
02/10/2003 +129 days 🔍
04/09/2004 +423 days 🔍
10/01/2010 +2366 days 🔍
07/29/2014 +1397 days 🔍
09/10/2025 +4061 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: archives.neohapsis.com
Researcher: Peter Gründl
Status: Confirmed

CVE: CVE-2002-0935 (🔍)
GCVE (CVE): GCVE-0-2002-0935
GCVE (VulDB): GCVE-100-18871
X-Force: 9396
SecurityFocus: 5067 - Apache Tomcat Null Character Malformed Request Denial Of Service Vulnerability
OSVDB: 5051 - Apache Tomcat Null Character DoS
Vulnerability Center: 937 - Apache Tomcat Null Character Malformed Request Denial Of Service Vulnerability, High

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

Entryinfo

Created: 07/29/2014 11:18
Updated: 09/10/2025 20:30
Changes: 07/29/2014 11:18 (65), 05/09/2019 16:38 (11), 09/10/2025 20:30 (19)
Complete: 🔍
Cache ID: 216::103

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