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Title
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DDIVRT-2008-11 BadBlue uninst.exe DoS
Severity
--------
Medium
Date Discovered
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March 5th 2008
Discovered By
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Digital Defense, Inc. Vulnerability Research Team
Credit: Steven James and r@b13$
Vulnerability Description
-------------------------
BadBlue is a web server used for peer-to-peer file sharing. By default, several executable files are
stored in the web root: badblue.exe, uninst.exe, and dyndns.exe. Executable files stored in the web
root of BadBlue can be launched remotely by any user. This can be leveraged to create a DoS condition
by repeatedly invoking the uninst.exe executable. Due to the fact that BadBlue has not released a
patch for the previously documented directory traversal vulnerability (CVE 2007-6378), an attacker may
utilize these two flaws in conjunction to place a malicious executable in the web root and compromise
a vulnerable server.
Solution Description
--------------------
Restrict access to the executables already in the web root (badblue.exe, uninst.exe, and dyndns.exe)
and take steps to ensure that users cannot write files to the web root.
Tested Systems / Software (with versions)
------------------------------------------
BadBlue Personal Edition version 2.72 has been tested on Windows XP and Windows Server 2003. Other
versions and systems are assumed to be vulnerable.
Vendor Contact
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Vendor Name: BadBlue
Vendor Website: www.badblue.com
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