Cis Apache 11.1
DevOps & Securitycis-apache-11.1Cis Apache 11.1 is an Agent Skill for devops & security published in the CyberStrikeus/CyberStrike repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.
Ensure SELinux Is Enabled in Enforcing Mode
How to use this skill
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Ensure SELinux Is Enabled in Enforcing Mode
Description
SELinux (Security-Enhanced Linux) is a Linux kernel security module that provides mandatory access control security policies with type enforcement that are checked after the traditional discretionary access controls. It was created by the US National Security Agency and can enforce rules on files and processes in a Linux system, and restrict actions, based on defined policies.
Rationale
Web applications and services continue to be one of the leading attack vectors for black-hat criminals to gain access to information and servers. The threat is high because web servers are often externally accessible and typically have the greatest share of server-side vulnerabilities. The SELinux mandatory access controls provide a much stronger security model which can be used to implement a deny-by-default model only allowing what is explicitly permitted.
Impact
None documented
Audit Procedure
Perform the following steps to determine if the recommended state is implemented:
Use the sestatus command to check that SELinux is enabled and that both the current mode and the configured mode are set to enforcing.
$ sestatus | grep -i mode
Current mode: enforcing
Mode from config file: enforcing
Remediation
Perform the following to implement the recommended state:
If SELinux is not enabled in the configuration file, edit the file /etc/selinux/config and set the value of SELINUX as enforcing. Reboot the system for the new configuration to be effective.
SELINUX=enforcing
If the current mode is not enforcing and an immediate reboot is not possible, the current mode can be set to enforcing with the command shown below.
# setenforce 1
Default Value
SELinux is not enabled by default.
References
CIS Controls
Version 6
14.4 Protect Information With Access Control Lists All information stored on systems shall be protected with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities.
Version 7
14.7 Enforce Access Control to Data through Automated Tools Use an automated tool, such as host-based Data Loss Prevention, to enforce access controls to data even when data is copied off a system.
Profile
Level 2 | Scored