Detections
Analytics

1.435 OL09-00-006031

Information

OL 9 must limit the number of bogus Internet Control Message Protocol (ICMP) response errors logs.

GROUP ID: V-271874
RULE ID: SV-271874r1092612

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.

Solution

Configure OL 9 to not log bogus ICMP errors:

Add or edit the following line in a single system configuration file in the "/etc/sysctl.d/" directory:

net.ipv4.icmp_ignore_bogus_error_responses = 1

Load settings from all system configuration files with the following command:

$ sudo sysctl --system

See Also

https://workbench.cisecurity.org/benchmarks/27024

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CCI|CCI-000366, Rule-ID|SV-271874r1092612_rule, STIG-ID|OL09-00-006031, Vuln-ID|V-271874

Plugin: Unix

Control ID: 5a9f3967cb2450b03883d1ef71a8c00c231d0c0c35e696b74a4a094e79a6bdaa