Neohapsis is currently accepting applications for employment. For more information, please visit our website www.neohapsis.com or email hr@neohapsis.com
Subject: Big Brother filename extension vulnerability
From: xternal (xternal1YAHOO.COM)
Date: Tue Jul 11 2000 - 18:11:39 CDT

versions affected: bb14h2 (current) and older

        bbd listens for incoming connections on port 1984.
Using telnet or the bb client, it is possible to
connect and create a filename with an arbitrary
extension, as the extension is not rigorously checked.
 As this file is droped into a directory accessible
via the web server, any file extension that is parsed
server side can be abused. For example:

./bb "status evil.php3 <?<system(\"cat

will allow viewing of the /etc/passwd upon browsing to

        -Modify bbd.c to only allowed specified file
extensions(.disk, .proc ...)

        -Implement access restrictions via
$BBHOME/etc/security to minimize exposure to
vulnerabilities. Unfortunately, the default install
doesn't enable the security file.

Do You Yahoo!?
Get Yahoo! Mail Free email you can access from anywhere!