SecurityReason - BadBlue uninst.exe DoS

Advisory Text :

Title

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DDIVRT-2008-11 BadBlue uninst.exe DoS

Severity

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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

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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

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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)

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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