Description: The Targeted Policy is a type of security policy implemented in SELinux (Security-Enhanced Linux) that focuses on managing permissions and access for specific applications and services. Unlike more general policies, which can be complex and difficult to manage, the Targeted Policy allows system administrators to define security rules that are more precise and tailored to the needs of each application. This results in a more manageable and efficient security configuration, as access controls can be established that limit applications’ interactions with the operating system and other resources. Targeted policies are particularly useful in environments where a high level of security is required, such as web servers, databases, and systems handling sensitive data. By allowing for more granular customization of permissions, the risks of vulnerabilities are minimized, and the overall protection of the system is improved. In summary, the Targeted Policy in SELinux is a key tool for implementing effective security measures tailored to the specific characteristics of applications and services in a Linux environment.
History: The Targeted Policy was introduced as part of SELinux, a project initiated by the United States National Security Agency (NSA) in the 2000s. SELinux was developed to provide a mandatory access control framework in Linux systems, and the Targeted Policy was designed to facilitate the adoption of SELinux in production environments. Over the years, SELinux and its Targeted Policy have evolved, incorporating enhancements and expansions that have allowed its use across various Linux distributions.
Uses: The Targeted Policy is primarily used in environments where strict access control is required, such as web servers, databases, and systems handling sensitive information. It allows administrators to define specific rules for applications, limiting their ability to interact with other processes and system resources. This helps prevent attacks and contain potential security breaches.
Examples: An example of using the Targeted Policy is in a web server running Apache. With this policy, rules can be established that limit Apache’s access to only the necessary files and directories, thereby reducing the attack surface and improving the overall security of the server.
