cyberstrikeus Ensure the httpd_t Type is Not in Permissive Mode (Automated)
Profile Applicability
- Level 2
Description
In addition to setting the entire SELinux configuration in permissive mode, it is possible to set individual process types (domains) such as httpd_t into a permissive mode as well. The permissive mode will not prevent any access or actions, instead, any actions that would have been denied are simply logged.
Rationale
Usage of the permissive mode is helpful for testing and ensuring that SELinux will not prevent access that is necessary for the proper function of a web application. However, all access is allowed in permissive mode by SELinux.
Audit
Perform the following steps to determine if the recommended state is implemented:
Check that the httpd_t process type (domain) is not in permissive mode with the semodule command. There should be no output if the type is not set to permissive.
# semodule -l | grep permissive_httpd_t
Remediation
Perform the following to implement the recommended state:
If the httpd_t type is in permissive mode; the customized permissive mode should be deleted with the following semanage command.
# semanage permissive -d httpd_t
Default Value
The httpd_t type is not in permissive mode by default.
References
CIS Controls
v8:
- 2.5 Allowlist Authorized Software
- Use technical controls, such as application allowlisting, to ensure that only authorized software can execute or be accessed. Reassess bi-annually, or more frequently.
v7:
- 3.3 Configure Data Access Control Lists
- Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications.
- 2.7 Utilize Application Whitelisting
- Utilize application whitelisting technology on all assets to ensure that only authorized software executes and all unauthorized software is blocked from executing on assets.
Profile
- Level 2