Amazon Linux 2023 must disable access to network bpf system call from nonprivileged processes.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-274004 | SRG-OS-000132-GPOS-00067 | AZLX-23-000215 | SV-274004r1120000_rule | 2025-07-15 | 1 |
| Description |
|---|
| Loading and accessing the packet filters programs and maps using the bpf() system call has the potential of revealing sensitive information about the kernel state. |
| ℹ️ Check |
|---|
| Verify Amazon Linux 2023 prevents privilege escalation through the kernel by disabling access to the bpf system call with the following commands: $ sudo sysctl kernel.unprivileged_bpf_disabled kernel.unprivileged_bpf_disabled = 1 If the returned line does not have a value of "1", or a line is not returned, this is a finding. |
| ✔️ Fix |
|---|
| Configure Amazon Linux 2023 to prevent privilege escalation through the kernel by disabling access to the bpf syscall by adding the following line to a file, in the "/etc/sysctl.d" directory: kernel.unprivileged_bpf_disabled = 1 The system configuration files must be reloaded for the changes to take effect. To reload the contents of the files, run the following command: $ sudo sysctl --system |