The system must not process Internet Control Message Protocol (ICMP) timestamp requests.

From HP-UX 11.31 Security Technical Implementation Guide

Part of GEN003602

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-35022r1_rule The system must not process Internet Control Message Protocol (ICMP) timestamp requests.

Vulnerability discussion

The processing of ICMP timestamp requests increases the attack surface of the system.

Check content

Verify the system does not respond to ICMP Timestamp requests. # ndd -get /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 Edit /etc/rc.config.d/nddconf and add/set: TRANSPORT_NAME[x]=ip NDD_NAME[x]=ip_respond_to_timestamp NDD_VALUE[x]=0

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