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1.328 OL09-00-002430

Information

OL 9 must enable hardening for the Berkeley Packet Filter (BPF) just-in-time compiler.

GROUP ID: V-271768
RULE ID: SV-271768r1092016

When hardened, the extended BPF just-in-time (JIT) compiler will randomize any kernel addresses in the BPF programs and maps and will not expose the JIT addresses in "/proc/kallsyms".

Solution

Configure OL 9 to enable hardening for the BPF JIT compiler by adding the following line to a file, in the "/etc/sysctl.d" directory:

net.core.bpf_jit_harden = 2

The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run 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-271768r1092016_rule, STIG-ID|OL09-00-002430, Vuln-ID|V-271768

Plugin: Unix

Control ID: 95c86b522beec408f0deed6ae501213c4091dce503c066ab4e7a1761eb836d76