-----BEGIN PGP SIGNED MESSAGE----- CERT Advisory CA-2002-14 Buffer overflow in Macromedia JRun Original release date: May 29, 2002 Last revised: -- Source: CERT/CC A complete revision history can be found at the end of this file. Systems Affected * Windows NT4 or Windows 2000 running IIS versions 4 or 5 and Macromedia JRun 3.0 or 3.1 Overview A remotely exploitable buffer overflow exists in Macromedia's JRun 3.0 and 3.1. I. Description JRun is an application server that works with most popular web servers, such as Apache and Internet Information Server (IIS). According to Macromedia, JRun is deployed at over 10,000 organizations worldwide. As reported in the Next Generation Security Software Advisory (#NISR29052002), a remotely exploitable buffer overflow exists in the ISAPI filter/application. Specifically, the buffer overflow exists in the portion of code that handles the host header field. If an attacker sends a specially crafted request to the application server, he can overwrite a return address on the stack. Because the vulnerable DLL is running in the address space of the web server process, code submitted by the attacker will be run with SYSTEM privileges. II. Impact A remote attacker can execute arbitrary code on the vulnerable target with SYSTEM privileges. III. Solution Apply a patch from Macromedia or upgrade to JRun 4. The patch is available from: http://www.macromedia.com/v1/Handlers/index.cfm?ID=22273&Method=Full#download JRun 4 is available at: http://www.macromedia.com/software/jrun/ Appendix A. - Vendor Information This appendix contains information provided by vendors for this advisory. Additional information can be found in VU#703835. Macromedia Inc. Macromedia has confirmed that this is a problem in older versions of JRun 3.0 and 3.1 and is soon to publish a security bulletin regarding this. Visit the Macromedia security zone site at http://www.macromedia.com/security for more information. _________________________________________________________________ This vulnerability was discovered by David Litchfield of Next Generation Security Software. _________________________________________________________________ Author: Ian A. Finlay ______________________________________________________________________ This document is available from: http://www.cert.org/advisories/CA-2002-14.html ______________________________________________________________________ CERT/CC Contact Information Email: cert@cert.org Phone: +1 412-268-7090 (24-hour hotline) Fax: +1 412-268-6989 Postal address: CERT Coordination Center Software Engineering Institute Carnegie Mellon University Pittsburgh PA 15213-3890 U.S.A. CERT/CC personnel answer the hotline 08:00-17:00 EST(GMT-5) / EDT(GMT-4) Monday through Friday; they are on call for emergencies during other hours, on U.S. holidays, and on weekends. Using encryption We strongly urge you to encrypt sensitive information sent by email. Our public PGP key is available from http://www.cert.org/CERT_PGP.key If you prefer to use DES, please call the CERT hotline for more information. Getting security information CERT publications and other security information are available from our web site http://www.cert.org/ To subscribe to the CERT mailing list for advisories and bulletins, send email to majordomo@cert.org. Please include in the body of your message subscribe cert-advisory * "CERT" and "CERT Coordination Center" are registered in the U.S. Patent and Trademark Office. ______________________________________________________________________ NO WARRANTY Any material furnished by Carnegie Mellon University and the Software Engineering Institute is furnished on an "as is" basis. Carnegie Mellon University makes no warranties of any kind, either expressed or implied as to any matter including, but not limited to, warranty of fitness for a particular purpose or merchantability, exclusivity or results obtained from use of the material. Carnegie Mellon University does not make any warranty of any kind with respect to freedom from patent, trademark, or copyright infringement. _________________________________________________________________ Conditions for use, disclaimers, and sponsorship information Copyright 2002 Carnegie Mellon University. Revision History May 29, 2002: Initial release -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.8 iQCVAwUBPPVQSqCVPMXQI2HJAQGVHgP/U5zIg4973uYvBmeM4X06vfkHbRFG7YM8 nwnnqneHG/xPkytz3LpjfbbBtmdXWJmfJK64J/R9vGu84Cbp3NR2MvDPQ6J3c+7+ v6/uaemXWZZdbpxtLTULWqCsy+Fkp6XpOekvImEek1A9jKxVnH2lB42OwW28pmap RYbu1k04txk= =RYRj -----END PGP SIGNATURE-----