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CERT Coordination Center

Macromedia JRun Server is vulnerable to buffer overflow

Vulnerability Note VU#990200

Original Release Date: 2004-10-12 | Last Revised: 2004-10-14


A buffer overflow vulnerability exists in the Macromedia JRun web server that may allow an attacker to cause a denial-of-service condition.


JRun is an application server that works with most popular web servers, such as Apache and IIS. The JRun web server is vulnerable to a buffer overflow when it is placed in verbose debugging mode. Although this mode is disbled by default, if accidently left on an attacker may be able to crash the web server.


An attacker may be able to crash the web server resulting in a denial-of-service condition.


Apply Patch

For JRun versions 3.0 and 3.1, a patch is available at:

For JRun version 4.0, apply the latest updater:

Vendor Information


Macromedia Inc. Affected

Notified:  September 29, 2004 Updated: October 11, 2004



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


The CERT/CC has no additional comments at this time.

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

CVSS Metrics

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This vulnerability was reported in Macromedia Security Bulletin MPSB04-08.

This document was written by Jeff Gennari.

Other Information

CVE IDs: None
Severity Metric: 0.08
Date Public: 2004-09-23
Date First Published: 2004-10-12
Date Last Updated: 2004-10-14 15:20 UTC
Document Revision: 36

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