DRAFT - ANSSI-BP-028 (high)
Rules and Groups employed by this XCCDF Profile
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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 -
Add nosuid Option to /var/log
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/log</code>. The SUID and SGID permissions sh...Rule Medium Severity -
Add nosuid Option to /var
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var</code>. The SUID and SGID permissions should...Rule Medium Severity -
Add noexec Option to /var/tmp
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/tmp</code>. Add the <code>noexec</code> ...Rule Medium Severity -
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 Programs from Dangerous Execution Patterns
The recommendations in this section are designed to ensure that the system's features to protect against potentially dangerous program execution ar...Group
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