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From: james at (James McGlinn)
Subject: SQL Injection vulnerability in bBlog 0.7.3 Security Advisory SCN200409-1
Available in HTML format at

SQL Injection vulnerability in bBlog 0.7.3

Author: James McGlinn, Ltd <james_at_servers dot co dot 
Discovery Date: September 28, 2004
Package: bBlog
Versions Affected: 0.7.2, 0.7.3
Severity: Severe - a remote user can gain administrative privileges.


Problem: There is an SQL Injection vulnerability in versions of bBlog 
prior to 0.7.3, which can be exploited to gain administrative access if 
register_globals is enabled on the web server.

Introduction: bBlog is a blogging system written in PHP and released 
under the GPL. It is used by thousands of bloggers worldwide and has 
features not found on other blogging systems including advanced comment 
spam prevention and threaded comments.

Discussion: The array $p is not initialised before being populated and 
passed to $bBlog->make_post_query() on line 30 of rss.php. In an 
environment where register_globals is enabled, $p can be introduced to 
the script with unfiltered elements from user input.

Using a specially crafted URL, POST data or cookie a remote user can 
gain access to the admin user's access credentials. Exploit withheld at 
project maintainer's request.

Solution: This issue is fixed as of version 0.7.4. A patch for rss.php 
of version 0.7.3 is available at the URL below:


ABOUT SERVERS.CO.NZ LTD are leaders in the design, implementation & auditing of 
effective online information systems for SMEs.

Phone: (NZ) 0800 4 SERVERS


James McGlinn
Project Manager
BCom, BSc, Zend Certified Engineer (PHP) Ltd
68 Shortland St, Auckland	PO Box 3688 Shortland St, Auckland, New 
Phone: 0800 4 SERVERS	Fax: +64 9 358 5187

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