ANSSI-BP-028 (intermediary)
Rules and Groups employed by this XCCDF Profile
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Add nosuid Option to /var/tmp
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/tmp</code>. The SUID and SGID permissions sh...Rule Medium Severity -
Restrict Access to Kernel Message Buffer
To set the runtime status of the <code>kernel.dmesg_restrict</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.dmesg...Rule Low Severity -
Limit CPU consumption of the Perf system
To set the runtime status of the <code>kernel.perf_cpu_time_max_percent</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w k...Rule Medium Severity -
Limit sampling frequency of the Perf system
To set the runtime status of the <code>kernel.perf_event_max_sample_rate</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w ...Rule Medium Severity -
Disallow kernel profiling by unprivileged users
To set the runtime status of the <code>kernel.perf_event_paranoid</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel....Rule Low Severity -
Configure maximum number of process identifiers
To set the runtime status of the <code>kernel.pid_max</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.pid_max=6553...Rule Medium Severity -
Disallow magic SysRq key
To set the runtime status of the <code>kernel.sysrq</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.sysrq=0</pre> ...Rule Medium Severity -
Disable Access to Network bpf() Syscall From Unprivileged Processes
To set the runtime status of the <code>kernel.unprivileged_bpf_disabled</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w k...Rule Medium Severity -
Restrict usage of ptrace to descendant processes
To set the runtime status of the <code>kernel.yama.ptrace_scope</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.ya...Rule Medium Severity -
Harden the operation of the BPF just-in-time compiler
To set the runtime status of the <code>net.core.bpf_jit_harden</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.core.b...Rule Medium Severity -
Prevent applications from mapping low portion of virtual memory
To set the runtime status of the <code>vm.mmap_min_addr</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w vm.mmap_min_addr=...Rule Medium Severity -
Enable page allocator poisoning
To enable poisoning of free pages, add the argument <code>page_poison=1</code> to the default GRUB 2 command line for the Linux operating system. C...Rule Medium Severity -
Enable SLUB/SLAB allocator poisoning
To enable poisoning of SLUB/SLAB objects, add the argument <code>slub_debug=<xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_slub_debug...Rule Medium Severity -
Verify Group Who Owns /etc/selinux Directory
To properly set the group owner of/etc/selinux, run the command:$ sudo chgrp root /etc/selinux
Rule Medium Severity -
Verify User Who Owns /etc/selinux Directory
To properly set the owner of/etc/selinux, run the command:$ sudo chown root /etc/selinux
Rule Medium Severity -
Verify Permissions On /etc/selinux Directory
To properly set the permissions of/etc/selinux, run the command:$ sudo chmod 0755 /etc/selinux
Rule Medium Severity -
Verify Group Who Owns /etc/sestatus.conf File
To properly set the group owner of/etc/sestatus.conf, run the command:$ sudo chgrp root /etc/sestatus.conf
Rule Medium Severity -
Verify User Who Owns /etc/sestatus.conf File
To properly set the owner of/etc/sestatus.conf, run the command:$ sudo chown root /etc/sestatus.conf
Rule Medium Severity -
Verify Permissions On /etc/sestatus.conf File
To properly set the permissions of/etc/sestatus.conf, run the command:$ sudo chmod 0644 /etc/sestatus.conf
Rule Medium Severity -
Configure the polyinstantiation_enabled SELinux Boolean
By default, the SELinux boolean <code>polyinstantiation_enabled</code> is disabled. This setting should be configured to <xccdf-1.2:sub idref="xccd...Rule Medium Severity
Node 2
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