Macromedia Patch Available for ISAPI buffer overflow in JRun 3.0/ 3.1From: Stephen Dupre (sdupre@MACROMEDIA.COM)
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Date: Wed, 29 May 2002 19:15:49 -0400 From: Stephen Dupre <sdupre@MACROMEDIA.COM> To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
Macromedia has worked with David Litchfield from NGSSoftware regarding his bulletin
"Macromedia JRUN Buffer overflow vulnerability (#NISR29052002)"
and have given him credit for bringing this to our attention.
The text of the bulletin is below.
Stephen Dupre, Security Response Team
MPSB02-02-Patch Available for ISAPI buffer overflow in JRun 3.0/3.1
Buffer overflow of ISAPI filter could be used in a denial of service attack by creating a very large Host header field in a request.
NOTE: Customers who have applied security patches since November 2001 already have these fixes in JRun 3.0 25232 and JRun 3.1 26414 (the 3.1 cumulative patch). Builds prior to these are vulnerable.
The issue described in this bulletin exists in JRun 3.0 and JRun 3.1 for Microsoft IIS web servers using the ISAPI connector (Windows).
Affected Software Versions
* JRun 3.1 (all editions)
* JRun 3.0 (all editions)
What Macromedia is Doing
Macromedia has published this bulletin, notifying customers of the issue. Macromedia has also released a patch that should resolve the issue in JRun 3.1 and 3.0.
JRun users can find the patch for installation at the following URLs. Use the patch and JRun version appropriate to your platform. Instructions for installation are included.
It is recommended that you back up your existing data before applying any patch.
What Customers Should Do
We strongly encourage customers to download and install this patch immediately.
Please note: As always, customers should test patch changes in a testing environment before modifying production servers.
NOTE: The cumulative patch has several security fixes that require a manual update AFTER installing the cumulative release to replace the web server ISAPI filter used by JRun. Follow these instructions to properly patch your web server JRun filter. This is the most important part of the installation in terms of securing the web server.
* Shut down JRun servers and the Microsoft IIS web server. On some systems, this requires shutdown of the IIS Admin Service and World Wide Web Publishing service in Control Panel.
* Copy the jrun/connectors/isapi/intel-win/jrun.dll to the /inetpub/scripts directory or re-run the connector wizard in the JRun Management Console (JMC).
* Restart the web server and JRun
May 29, 2002 -- Bulletin first created.
Reporting Security Issues Credit
Macromedia would like to thank David Litchfield from NGS Software ( <http://www.ngssoftware.com> www.ngssoftware.com) in the United Kingdom for bringing this to our attention.
Reporting Security Issues
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Receiving Security Bulletins
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Macromedia reserves the right, from time to time, to update the information in this document with current information.