ANSSI-BP-028 (enhanced)
Rules and Groups employed by this XCCDF Profile
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Record Events that Modify the System's Discretionary Access Controls - lremovexattr
At a minimum, the audit system should collect file permission changes for all users and root. <br><br> If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to ...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - lsetxattr
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audi...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - removexattr
At a minimum, the audit system should collect file permission changes for all users and root. <br><br> If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to ...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - setxattr
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audi...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - umount2
At a minimum, the audit system should collect file system umount2 changes. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daem...Rule Medium Severity -
Record File Deletion Events by User
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Group -
Ensure auditd Collects File Deletion Events by User - rename
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Rule Medium Severity -
Ensure auditd Collects File Deletion Events by User - renameat
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Rule Medium Severity -
Ensure auditd Collects File Deletion Events by User - rmdir
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Rule Medium Severity -
Ensure auditd Collects File Deletion Events by User - unlink
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Rule Medium Severity -
Ensure auditd Collects File Deletion Events by User - unlinkat
At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit r...Rule Medium Severity -
Record Unauthorized Access Attempts Events to Files (unsuccessful)
At a minimum, the audit system should collect unauthorized file accesses for all users and root. Note that the "-F arch=b32" lines should be present even on a 64 bit system. These commands identify...Group -
Record Unsuccessful Access Attempts to Files - creat
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - ftruncate
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - open
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - openat
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Unsuccessful Access Attempts to Files - truncate
At a minimum, the audit system should collect unauthorized file accesses for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read a...Rule Medium Severity -
Record Information on Kernel Modules Loading and Unloading
To capture kernel module loading and unloading events, use following lines, setting ARCH to either b32 for 32-bit system, or having two lines for both b32 and b64 in case your system is 64-bit: <pr...Group -
Ensure auditd Collects Information on Kernel Module Unloading - delete_module
To capture kernel module unloading events, use following line, setting ARCH to either b32 for 32-bit system, or having two lines for both b32 and b64 in case your system is 64-bit: <pre>-a always,...Rule Medium Severity -
Ensure auditd Collects Information on Kernel Module Loading and Unloading - finit_module
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following lines to a file with suffix <co...Rule Medium Severity -
Ensure auditd Collects Information on Kernel Module Loading - init_module
To capture kernel module loading events, use following line, setting ARCH to either b32 for 32-bit system, or having two lines for both b32 and b64 in case your system is 64-bit: <pre>-a always,ex...Rule Medium Severity -
Record Attempts to Alter Logon and Logout Events
The audit system already collects login information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during dae...Group -
Record Attempts to Alter Logon and Logout Events - faillock
The audit system already collects login information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during dae...Rule Medium Severity -
Record Attempts to Alter Logon and Logout Events - lastlog
The audit system already collects login information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during dae...Rule Medium Severity -
Record Information on the Use of Privileged Commands
At a minimum, the audit system should collect the execution of privileged commands for all users and root.Group -
Ensure auditd Collects Information on the Use of Privileged Commands
The audit system should collect information about usage of privileged commands for all users. These are commands with suid or sgid bits on and they are specially risky in local block device partiti...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - insmod
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - kmod
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - modprobe
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - rmmod
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Ensure auditd Collects Information on the Use of Privileged Commands - sudo
At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program...Rule Medium Severity -
Records Events that Modify Date and Time Information
Arbitrary changes to the system time can be used to obfuscate nefarious activities in log files, as well as to confuse network services that are highly dependent upon an accurate system time. All c...Group -
Record attempts to alter time through adjtimex
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
Record Attempts to Alter Time Through clock_settime
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
Record Attempts to Alter Time Through stime
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
Record Attempts to Alter the localtime File
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity -
GRUB2 bootloader configuration
During the boot process, the boot loader is responsible for starting the execution of the kernel and passing options to it. The boot loader allows for the selection of different kernels - possibly ...Group -
IOMMU configuration directive
On x86 architecture supporting VT-d, the IOMMU manages the access control policy between the hardware devices and some of the system critical units such as the memory. To ensure that <code>iomm...Rule Unknown Severity -
Configure L1 Terminal Fault mitigations
L1 Terminal Fault (L1TF) is a hardware vulnerability which allows unprivileged speculative access to data which is available in the Level 1 Data Cache when the page table entry isn't present. Sele...Rule High Severity -
Force kernel panic on uncorrected MCEs
A Machine Check Exception is an error generated by the CPU itdetects an error in itself, memory or I/O devices. These errors may be corrected and generate a check log entry, if an error cannot be c...Rule Medium Severity -
Ensure SMAP is not disabled during boot
The SMAP is used to prevent the supervisor mode from unintentionally reading/writing into memory pages in the user space, it is enabled by default since Linux kernel 3.7. But it could be disabled t...Rule Medium Severity -
Ensure SMEP is not disabled during boot
The SMEP is used to prevent the supervisor mode from executing user space code, it is enabled by default since Linux kernel 3.0. But it could be disabled through kernel boot parameters. Ensure tha...Rule Medium Severity -
Configure the confidence in TPM for entropy
The TPM security chip that is available in most modern systems has a hardware RNG. It is also used to feed the entropy pool, but generally not credited entropy. Use <code>rng_core.default_quality<...Rule Low Severity -
Disable merging of slabs with similar size
The kernel may merge similar slabs together to reduce overhead and increase cache hotness of objects. Disabling merging of slabs keeps the slabs separate and reduces the risk of kernel heap overflo...Rule Medium Severity -
Configure Speculative Store Bypass Mitigation
Certain CPUs are vulnerable to an exploit against a common wide industry wide performance optimization known as Speculative Store Bypass (SSB). In such cases, recent stores to the same memory loca...Rule Medium Severity -
Enforce Spectre v2 mitigation
Spectre V2 is an indirect branch poisoning attack that can lead to data leakage. An exploit for Spectre V2 tricks the indirect branch predictor into executing code from a future indirect branch cho...Rule High Severity -
Non-UEFI GRUB2 bootloader configuration
Non-UEFI GRUB2 bootloader configurationGroup -
Set Boot Loader Password in grub2
The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br><br> Since plaintext passwords are a security risk, generate a hash for the ...Rule High Severity -
UEFI GRUB2 bootloader configuration
UEFI GRUB2 bootloader configurationGroup -
Set the UEFI Boot Loader Password
The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br><br> Since plaintext passwords are a security risk, generate a hash for the ...Rule High Severity
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