https://www.exploit-db.com/exploits/20586
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200012-199

Phorum是Phorum团队开发的一套基于PHP和MySQL的开源论坛应用程序。Phorum存在一个问题，远程攻击者可以访问本地系统文件。admin.php3脚本用于安全和管理被创建的论坛。它带有口令保护，但存在漏洞可以无需访问权限修改管理员口令。一旦拥有了管理功能的访问权限，就可以进入”MasterSetting”功能，在”default.langfilename”输入框输入想要访问的系统本地文件，重新载入admin.php3页面后就可以浏览这个文件的内容了。

source: http://www.securityfocus.com/bid/2271/info

Phorum is a popular, free, open source software package originally written by Brian Moon. The package is designed to add chat/bulletin board style interaction between visitors of a web site.

A problem with Phorum can allow remote users access to restricted files on the local system. This is due to the handling of passwords by the program. By sending a custom crafted string to the admin.php3 script, it's possible to change the administrative password of the board without verification of the users credentials. The "default .langname name" field in the Master settings can then be changed to any file of the users liking, which upon reload, will be output as the page. This problem makes it possible for a user with malicious motives to take control of the message board, read any file on the system, and potentially gain remote access. 

First, send the following URL to Phorum, which changes the password to flow:

http://www.example.com/admin.php3?step=4&option=pass&confirm=flow&newPssword=flow

Next, after gaining administrative access to the system, enter the "Master Settings" menu, and set the "default .langfile name" to the following:

../../../../../../../../../../../etc/passwd

This will make the contents of the /etc/passwd file viewable.

来源:BID
名称:2271
链接:http://www.securityfocus.com/bid/2271
来源:BUGTRAQ
名称:20000106Phorum3.0.7exploitsandIDSsignatures
链接:http://cert.uni-stuttgart.de/archive/bugtraq/2000/01/msg00215.html