The system must not process ICMP timestamp requests.

From SOLARIS 10 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with: CCI-001551

SV-26621r2_rule The system must not process ICMP timestamp requests.

Vulnerability discussion

The processing of Internet Control Message Protocol (ICMP) timestamp requests increases the attack surface of the system.

Check content

Determine the type of zone that you are currently securing. # zonename If the zone is not the global zone, determine if any interfaces are exclusive to the zone: # dladm show-link If the output indicates "insufficient privileges" then this requirement is not applicable. If the zone is the global zone or the non-global zone has exclusive interfaces verify the system does not respond to ICMP timestamp requests. # ndd /dev/ip ip_respond_to_timestamp If the result is not 0, this is a finding.

Fix text

Disable ICMP timestamp responses on the system. # ndd -set /dev/ip ip_respond_to_timestamp 0 Also add this command to a system startup script.

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