Vulnerability Note VU#204710

Apache Tomcat fails to properly handle certain requests

Original Release date: 14 Mar 2005 | Last revised: 16 May 2007


Apache Tomcat does not properly handle certain types of requests allowing a remote attacker to cause a denial of service.


Apache Tomcat is an implementation of the Java Servlet and JavaServer Page (JSP) technologies. Tomcat uses the AJP12 protocol (on TCP 8007 by default) for Servlet/JSP communication. A flaw in Tomcat's implemetation of the AJP12 protocol may allow a remote attacker to cause Tomcat to stop processing requests. If a remote attacker sends Tomcat a specially crafted request, that attacker may be able to force Tomcat to stop processing all subsequent requests.

Please note that this vulnerability was reported in Tomcat version 3.x.


By sending Tomcat a specially crafted request, a remote attacker may be able to cause a denial of service.


Upgrade Tomcat

Upgrading to Tomcat version 5.x will correct this issue.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
ApacheAffected20 Jan 200501 Mar 2005
HitachiAffected-10 Mar 2005
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A


  • None


We thank HIRT (Hitachi Incident Response Team) for reporting this vulnerability.

This document was written by Jeff Gennari.

Other Information

  • CVE IDs: Unknown
  • Date Public: 14 Mar 2005
  • Date First Published: 14 Mar 2005
  • Date Last Updated: 16 May 2007
  • Severity Metric: 0.69
  • Document Revision: 34


If you have feedback, comments, or additional information about this vulnerability, please send us email.