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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

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TCP Chorusing

Vulnerability Assessment Summary Counts the number of ACKs to a SYN Detailed Explanation for this Vulnerability Assessment Microsoft Windows 95 and 98 clients have the ability to bind multiple TCP/IP stacks on the same MAC address, simply by having the protocol added more than once in the Network Control panel. The remote host has several TCP/IP stacks with the same IP bound on the same MAC address. As a result, it will reply several times to the same packets, such as by sending multiple ACK to a single SYN, creating noise on your network. If several hosts behave the same way, then your network will be brought down. Solution : Remove all the IP stacks except one in the remote host. Network Security Threat Level: Medium Networks Security ID: 225 Vulnerability Assessment Copyright: This script is Copyright (C) 1999 Renaud Deraison

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