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Test ID:
Title:Raptor/Novell Weak ISN

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
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 :

Risk factor : High

Cross-Ref: BugTraq ID: 5387
BugTraq ID: 8652
Common Vulnerability Exposure (CVE) ID: CVE-2002-1463
Bugtraq: 20020802 Security Advisory: Raptor Firewall Weak ISN Vulnerability (Google Search)
XForce ISS Database: symantec-tcp-seq-predict(12836)
CopyrightThis script is Copyright (C) 2002 Renaud Deraison

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