This script is Copyright (C) 2003-2014 Tenable Network Security, Inc.
The remote host has an application that is affected by DNS
lookup bypass vulnerability.
According to its banner, the remote host appears to be running
OpenSSH-portable version 3.6.1 or older.
There is a flaw in such version that could allow an attacker to
bypass the access controls set by the administrator of this server.
OpenSSH features a mechanism that can restrict the list of
hosts a given user can log from by specifying a pattern
in the user key file (ie: *.mynetwork.com would let a user
connect only from the local network).
However there is a flaw in the way OpenSSH does reverse DNS lookups.
If an attacker configures a DNS server to send a numeric IP address
when a reverse lookup is performed, this mechanism could be
Upgrade to OpenSSH 3.6.2 or later.
Risk factor :
High / CVSS Base Score : 7.5
CVSS Temporal Score : 6.5
Public Exploit Available : true