| name | cis-apache-12.3 |
| description | Ensure the Apache AppArmor Profile Is in Enforce Mode |
| category | cis-apache |
| version | 3.6.0 |
| author | cyberstrike-official |
| tags | ["cis","apache","linux","apparmor","mandatory-access-control","mac"] |
| cis_id | 12.3 |
| cis_benchmark | CIS Apache HTTP Server 2.2 Benchmark v3.6.0 |
| tech_stack | ["linux","apache"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Ensure the Apache AppArmor Profile Is in Enforce Mode
Description
AppArmor profiles may be in one of three modes: disabled, complain, or enforce. In the complain mode, any violations of the access controls are logged but the restrictions are not enforced. Also, once a profile mode has been changed, it is recommended to restart the Apache server, otherwise the currently running process may not be confined by the policy.
Rationale
The complain mode is useful for testing and debugging a profile but is not appropriate for production. Only the confined process running in enforce mode will prevent attacks that violate the configured access controls.
Impact
None documented
Audit Procedure
Perform the following steps to determine if the recommended state is implemented:
Use the aa-unconfined command to check that the apache2 policy is enforced, and that the currently running apache2 processes are confined. The output should include both confined by and (enforce).
1899 /usr/sbin/apache2 confined by '/usr/sbin/apache2 (enforce)'
1902 /usr/sbin/apache2 confined by '/usr/sbin/apache2 (enforce)'
1903 /usr/sbin/apache2 confined by '/usr/sbin/apache2 (enforce)'
. . .
Note that non-compliant results may include not confined or (complain), such as the following:
3304 /usr/sbin/apache2 not confined
2502 /usr/sbin/apache2 confined by '/usr/sbin/apache2 (complain)'
4004 /usr/sbin/apache2 confined by
'/usr/sbin/apache2//HANDLING_UNTRUSTED_INPUT (complain)'
Remediation
Perform the following to implement the recommended state:
- Set the profile state to enforce mode.
Default Value
The default Apache profile is very permissive.
References
- https://wiki.ubuntu.com/AppArmor
CIS Controls
Version 6
2 Inventory of Authorized and Unauthorized Software
Inventory of Authorized and Unauthorized Software
Version 7