DRAFT - ANSSI-BP-028 (intermediary)
Rules and Groups employed by this XCCDF Profile
-
File Permissions and Masks
Traditional Unix security relies heavily on file and directory permissions to prevent unauthorized users from reading or modifying files to which t...Group -
Verify Permissions on Important Files and Directories
Permissions for many files on a system must be set restrictively to ensure sensitive information is properly protected. This section discusses impo...Group -
Verify that All World-Writable Directories Have Sticky Bits Set
When the so-called 'sticky bit' is set on a directory, only the owner of a given file may remove that file from the directory. Without the sticky b...Rule Medium Severity -
Ensure No World-Writable Files Exist
It is generally a good idea to remove global (other) write access to a file when it is discovered. However, check with documentation for specific a...Rule Medium Severity -
Enable Kernel Parameter to Enforce DAC on Hardlinks
To set the runtime status of the <code>fs.protected_hardlinks</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.protecte...Rule Medium Severity -
Enable Kernel Parameter to Enforce DAC on Symlinks
To set the runtime status of the <code>fs.protected_symlinks</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w fs.protected...Rule Medium Severity -
Verify Permissions on Files with Local Account Information and Credentials
The default restrictive permissions for files which act as important security databases such as <code>passwd</code>, <code>shadow</code>, <code>gro...Group -
Verify User Who Owns gshadow File
To properly set the owner of/etc/gshadow, run the command:$ sudo chown root /etc/gshadow
Rule Medium Severity -
Verify User Who Owns shadow File
To properly set the owner of/etc/shadow, run the command:$ sudo chown root /etc/shadow
Rule Medium Severity -
Verify Permissions on group File
To properly set the permissions of/etc/group, run the command:$ sudo chmod 0644 /etc/group
Rule Medium Severity -
Verify Permissions on gshadow File
To properly set the permissions of/etc/gshadow, run the command:$ sudo chmod 0000 /etc/gshadow
Rule Medium Severity -
Verify Permissions on passwd File
To properly set the permissions of/etc/passwd, run the command:$ sudo chmod 0644 /etc/passwd
Rule Medium Severity -
Verify Permissions on shadow File
To properly set the permissions of/etc/shadow, run the command:$ sudo chmod 0000 /etc/shadow
Rule Medium Severity -
Restrict Partition Mount Options
System partitions can be mounted with certain options that limit what files on those partitions can do. These options are set in the <code>/etc/fst...Group -
Add nosuid Option to /boot
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/boot</code>. The SUID and SGID permissions shoul...Rule Medium Severity -
Add nosuid Option to /home
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/home</code>. The SUID and SGID permissions shoul...Rule Medium Severity -
Add nodev Option to Non-Root Local Partitions
The <code>nodev</code> mount option prevents files from being interpreted as character or block devices. Legitimate character and block devices sho...Rule Medium Severity -
Add noexec Option to /tmp
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/tmp</code>. Add the <code>noexec</code> opti...Rule Medium Severity -
Add nosuid Option to /tmp
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/tmp</code>. The SUID and SGID permissions should...Rule Medium Severity -
Add noexec Option to /var/log
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/log</code>. Add the <code>noexec</code> ...Rule Medium Severity
Node 2
The content of the drawer really is up to you. It could have form fields, definition lists, text lists, labels, charts, progress bars, etc. Spacing recommendation is 24px margins. You can put tabs in here, and can also make the drawer scrollable.