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RHEL-10-800050 - RHEL 10 must enable hardening for the Berkeley Packet Filter (BPF) just-in-time compiler.
Information
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 RHEL 10 to enable hardening for the BPF JIT compiler.Create the drop-in file if it does not already exist:
$ sudo vi /etc/sysctl.d/99-net_core-bpf_jit_harden.conf
Add the following line to the file:
net.core.bpf_jit_harden = 2
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_V1R2_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 10 STIG v1r2
Category: SYSTEM AND INFORMATION INTEGRITY
References: 800-53|SI-16, CAT|II, CCI|CCI-002824, Rule-ID|SV-281337r1167161_rule, STIG-ID|RHEL-10-800050, Vuln-ID|V-281337
Plugin: Unix
Control ID: 8b125db7e5d58909df56f69ae45087d12a5756be363218d86497a34c13ae46f7