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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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Vulnerability Assessment Details

icmp netmask request

Vulnerability Assessment Summary
Sends an ICMP_MASKREQ

Detailed Explanation for this Vulnerability Assessment

The remote host answered to an ICMP_MASKREQ query and sent us its
netmask .

A possible hacker can use this information to understand how your network is set up
and how the routing is done. This may help him to bypass your filters.

Solution : reconfigure the remote host so that it does not answer to those
requests. Set up filters that deny ICMP packets of type 17.

Network Security Threat Level: Low

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 1999 Renaud Deraison

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