This script is Copyright (C) 2002-2016 Tenable Network Security, Inc.
The remote device seems to generate predictable TCP Initial Sequence
The remote host seems to generate Initial Sequence Numbers (ISN) in a weak
manner which seems to solely depend on the source and dest port of the TCP
An attacker may exploit this flaw to establish spoofed connections to the
The Raptor Firewall and Novell NetWare are known to be vulnerable to this
flaw, although other network devices may be vulnerable as well.
See also :
If you are using a Raptor Firewall, install the TCP security hotfix
described in Symantec's advisory. Otherwise, contact your vendor for
Risk factor :
High / CVSS Base Score : 7.5
CVSS Temporal Score : 6.2
Public Exploit Available : true