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Family: Firewalls --> Category: infos

Weak Initial Sequence Number Vulnerability Scan

Vulnerability Scan Summary
checks for ISN

Detailed Explanation for this Vulnerability Test

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

A possible hacker may exploit this flaw to establish spoofed connections to the
remote host.

The Raptor Firewall and Novell Netware are known to be vulnerable to this
flaw, although other network devices may be vulnerable as well.

Solution :

If you are using a Raptor Firewall, see

Otherwise, contact your vendor for a patch.

Reference :

Threat Level: High

Click HERE for more information and discussions on this network vulnerability scan.


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