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The MITRE CVE dictionary describes this issue as:

ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.

Find out more about CVE-1999-0524 from the MITRE CVE dictionary dictionary and NIST NVD.


Red Hat Enterprise Linux is configured by default to respond to all ICMP requests. Users may configure the firewall to prevent a system from responding to certain ICMP requests.

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