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 

Original Advisory: http://www.zone-h.org/en/advisories/read/id=2764/

Issue: Information disclosure enables attackers to take administrative control

Author: Trash-80 - dpangalos@linuxmail.org


Description

************

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

********

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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