ACLs

Definition

Access Control Lists (ACLs) are a set of rules that define permissions attached to an object, specifying which users or system processes are granted access to objects, as well as what operations are allowed on given objects. ACLs are used in various systems, including file systems, network devices, and applications, to enforce security policies by controlling access to resources.

Secure Settings Example

# Example of a secure ACL configuration in a Linux file system
# Granting read and write permissions to the owner, and read-only to the group
setfacl -m u:owner:rwx,g:group:rx,o::--- /path/to/file

Insecure Settings Example

# Example of an insecure ACL configuration in a Linux file system
# Granting full permissions to all users, which can lead to unauthorized access
setfacl -m u::rwx,g::rwx,o::rwx /path/to/file