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AUSCERT External Security Bulletin Redistribution
ESB-2002.251 -- CERT Advisory CA-2002-14
Buffer overflow in Macromedia JRun
30 May 2002
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AusCERT Security Bulletin Summary
---------------------------------
Product: Macromedia JRun 3.0
Macromedia JRun 3.1
Vendor: Macromedia
Operating System: Windows NT
Windows 2000
Impact: Administrator Compromise
Access Required: Remote
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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
______________________________________________________________________
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______________________________________________________________________
NO WARRANTY
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Copyright 2002 Carnegie Mellon University.
Revision History
May 29, 2002: Initial release
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