Vulnerability Note VU#703835
Macromedia JRun ISAPI DLL filter vulnerable to buffer overflow via request for long Host header field
A remotely exploitable buffer overflow exists in Macromedia's JRun version 3.1 on Win32 platforms.
A remotely exploitable buffer overflow exists in the Win32 version of Macromedia's JRun version 3.1 on Win32 platforms.
JRun is an application server that works with most popular web servers such as Apache and IIS. Macromedia states that 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 (at least on IIS 4 & 5), code submitted by the attacker will be run with SYSTEM privileges.
A remote attacker can execute arbitrary code on the vulnerable target with SYSTEM privileges.
Apply the patch from Macromedia Inc. or upgrade to JRun 4.
If you are a vendor and your product is affected, let
|Vendor||Status||Date Notified||Date Updated|
|Macromedia Inc.||Affected||29 May 2002||29 May 2002|
This vulnerability was discovered by David Litchfield of
Next Generation Security Software
This document was written by Ian A. Finlay.
29 May 2002
Date First Published:
29 May 2002
Date Last Updated:
09 Apr 2003
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