CVE-2009-0880 IBM System Director Remote SYSTEM Exploit Demo.

IBM Systems Director has a Web Service listening on 6988/TCP. This service, malady the “CIM Server”, in versions prior to 5.20.3 SP2 is vulnerable to a directory traversal vulnerability, permitting loading of local DLL files and their execution. This is assigned CVE-2009-0880.

Executing Local DLL files? Not really all that interesting. However, no rx then our good friend @kingcope decided to take a look at this bug, and suddenly, it became VERY interesting.

Because of how Windows treats files, you can not only load a LOCAL DLL file, but you can load a REMOTE DLL file, if said DLL file is made available over a WebDAV share. Essentially turning “Execute some file on the remote box” into “Remote code execution with SYSTEM privileges”.

How this exploit works, is it sends a specially crafted HTTP request to the CIM Listener service, telling it that it should totally load hackerhacker.dll because it is definately a legit DLL file to execute.

This software, being inherently silly, decides “Sure! Of course I will load this DLL file!” and loads the remote DLL file, executing whatever code is at its initialization routine (your reverse shell mayhaps?).

To make the whole party even more fun, the code is executed as SYSTEM, and no authentication whatsoever is needed to exploit this vulnerability.

The original exploit by Kingcope may be found here: http://isowarez.de/Exploits/IBMDirector.txt however he has disabled access to “wootwoot” DLL file, so I could not use his exploit code in the following demo. I ended up using the Metasploit module which was released shortly after his exploit came out.

What I find most interesting is that no one before Kingcope ever though about using a Webdav share to serve up a remotely loaded DLL. Perhaps now people will have to revise old bugs and write new, super effective exploits?

Without further ado, here is the demo!

2 thoughts on “CVE-2009-0880 IBM System Director Remote SYSTEM Exploit Demo.

    • Ah! A terrible oversight on my behalf there! I had forgotten about old fashioned DLL hijacking involving webdav shares!

      Will add an addentum to the article later :)

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