Detections
Analytics
RHEL-10-800180 - RHEL 10 must limit the number of bogus Internet Control Message Protocol (ICMP) response errors logs.
Information
Some routers will send responses to broadcast frames that violate RFC-1122, which fills up a log file system with many useless error messages. An attacker may take advantage of this and attempt to flood the logs with bogus error logs. Ignoring bogus ICMP error responses reduces log size, although some activity would not be logged.Satisfies: SRG-OS-000420-GPOS-00186, SRG-OS-000142-GPOS-00081
Solution
Configure RHEL 10 to not log bogus ICMP errors.Create a configuration file if it does not already exist:
$ sudo vi /etc/sysctl.d/ipv4_icmp_ignore_bogus_error_responses.conf
Add the following line to the file:
net.ipv4.icmp_ignore_bogus_error_responses = 1
Reload settings from all system configuration files with the following command:
$ sudo sysctl --system
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_10_V1R1_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 10 STIG v1r1
Category: SYSTEM AND COMMUNICATIONS PROTECTION
References: 800-53|SC-5, 800-53|SC-7(4)(d), CAT|II, CCI|CCI-001105, CCI|CCI-002385, Rule-ID|SV-281350r1167200_rule, STIG-ID|RHEL-10-800180, Vuln-ID|V-281350
Plugin: Unix
Control ID: 526b522378ca3c8b9b7f52f790f451ec98e5de410ee067ca185a587f6dd1424f