[UNIX] phpBannerExchange Directory Traversal

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phpBannerExchange Directory Traversal
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SUMMARY

<http://www.eschew.net> phpBannerExchange is "a PHP/mySQL script that
allows virtually anyone with minimal knowledge of PHP, mySQL and web
hosting to run their own banner exchange. This script was inspired by some
of the greatest ad rotation scripts on the Internet such as Webadverts and
phpAdsNew". A vulnerability has been identified in phpBannerExchange 2.0,
which may be exploited by remote attackers to access arbitrary files
outside of the webroot directory.

DETAILS

Vulnerable Systems:
* phpBannerExchange version 2.0

This flaw is due to an input validation error in the script "resetpw.php"
that does not properly sanitize the user-supplied input, which may be
exploited by remote attackers to retrieve arbitrary files from a
vulnerable system.

Proof of concept:
Go to the lost password script (resetpw.php) and type in
./../../../../../../../etc/passwd as your email address. This shows us
the contents of the /etc/passwd file of the system hosting the vulnerable
script.


ADDITIONAL INFORMATION

The information has been provided by <mailto:Rahigley.1989@xxxxxxxxx>
TiX.
The original article can be found at:
<http://www.h4cky0u.org/advisories/HYSA-2006-004-phpbanner.txt>
http://www.h4cky0u.org/advisories/HYSA-2006-004-phpbanner.txt



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