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phpBB "Upload Avatar from a URL" Weakness and PHP Code Execution Advisory Available in Danish 

Secunia Advisory: SA20093  
Release Date: 2006-05-16
Last Update: 2006-09-05

Critical:
Less critical
Impact: Security Bypass
System access
Where: From remote
Solution Status: Vendor Patch

Software:phpBB 2.x

CVE reference:CVE-2006-1896 (Secunia mirror)
CVE-2006-4450 (Secunia mirror)

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Description:
A weakness and a vulnerability have been discovered in phpBB, which can be exploited by malicious users to compromise a vulnerable system and by malicious people to use it for making HTTP requests to other sites.

1) A design error in the "Upload Avatar from a URL" functionality can be exploited to cause the server to make HTTP GET requests to arbitrary remote sites.

Successful exploitation requires that the "Enable avatar uploading" setting is enabled (disabled by default).

2) Input passed to the "Font Colour 3" field isn't properly sanitised before being used in a "preg_replace()" call with the "e" modifier. This can be exploited to inject and execute arbitrary PHP code.

Successful exploitation requires administrative privileges.

The weakness and the vulnerability have been confirmed in version 2.0.20. Other versions may also be affected.

Solution:
Update to version 2.0.21.
http://www.phpbb.com/downloads.php

Provided and/or discovered by:
1) rgod
2) noch22

Changelog:
2006-05-23: Updated advisory.
2006-06-09: Updated "Solution" section.
2006-09-05: Added CVE reference.



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

37 Related Secunia Security Advisories, displaying 10

1. phpBB Private Message Deletion Cross-Site Request Forgery
2. phpBB privmsg.php Cross-Site Request Forgery and Cross-Site Scripting
3. phpBB "avatar_path" PHP Code Execution Vulnerability
4. phpBB "cur_password" Cross-Site Scripting Vulnerability
5. phpBB "gen_rand_string()" Predictable RNG Weakness
6. phpBB "Referer" Header Session ID Disclosure
7. phpBB "url" bbcode Script Insertion Vulnerability
8. phpBB "Allow HTML" Script Insertion Security Issue
9. phpBB Multiple Vulnerabilities
10. phpBB Avatar Script Insertion Vulnerability

Show all related advisories


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