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The system must not respond to Internet Control Message Protocol (ICMP) timestamp requests sent to a broadcast address.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22411 | GEN003604 | SV-35026r1_rule | ECSC-1 | Medium |
| Description |
|---|
| The processing of ICMP timestamp requests increases the attack surface of the system. Responding to broadcast ICMP timestamp requests facilitates network mapping and provides a vector for amplification attacks. |
| STIG | Date |
|---|---|
| HP-UX 11.31 Security Technical Implementation Guide | 2017-12-08 |
Details
| Check Text ( C-36504r1_chk ) |
|---|
| Verify the system does not respond to ICMP timestamp requests set to broadcast addresses. # ndd -get /dev/ip ip_respond_to_timestamp_broadcast If the result is greater than 0, this is a finding. |
| Fix Text (F-31861r1_fix) |
|---|
| Configure the system to not respond to ICMP timestamp requests sent to broadcast addresses. # ndd -set /dev/ip ip_respond_to_timestamp_broadcast 0 Edit /etc/rc.config.d/nddconf and add/set: TRANSPORT_NAME[x]=ip NDD_NAME[x]=ip_respond_to_timestamp_broadcast NDD_VALUE[x]=0 |