ZH2003-12SA (security advisory): PHP-Gästebuch Ver. 1.60 Beta

Published: 23/07/2003

Released: 23/07/2003

Name: PHP-Gästebuch (http://www.php-gaestebuch.de)

Affected System(s): All versions (?)

Severity: Medium/High

Platform(s): Windows and Unix

Issue: Information disclosure enables attackers to take administrative

control

Author: Trash-80 - dpangalos (at) linuxmail (dot) org [email concealed]

Description

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Zone-h Security Team has discovered a serious security flaw in PHP-

Gästebuch Ver. 1.60 Beta and possibly in prior versions.

PHP-Gästebuch is a guestbook system that except a few bugs has functions

like flooding and webfilter protections ... ;)

Details

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1.guestbookdat contains admin's saved settings for PHP-Gästebuch. Is not

protected and an attacker can retrieve serious information about the

guestbook.

ex: www.example.com/guestbook/guestbookdat

2.pwd contains the admin's password which is encrypted by MD5 algorithm.

ex1: www.example.com/guestbook/pwd

ex2:md5 encrypted password: ee21d5f27a8401788147f6f6184ddb11

md5 unencrypted password: roland

An attacker using a md5 cracker like Cain & Abel (www.oxid.it), can crack

the hash and use the decrypted password in order to login as PHP-

Gästebuch's administrator.

ex: www.example.com/guestbook/admin.php

Solution

*********

Protect these two files: guestbookdat & pwd.

The vendor has been contacted.

Trash-80 - www.zone-h.org operator

http://www.zone-h.org

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