Changes to the parent will affect the child.
Unique Permissions: a child is inheriting from the parent, but the child has additional permissions applied directly. Simple Inheritance: a child’s ACL is the same as the parent ACL. In general, a Windows folder can be in one of three inheritance states: The security issue is that you expect the data to be limited access, but broken inheritance means that additional user(s) have access to data that they shouldn’t have access to. Broken permissions is a common data security issue and one that is quite difficult to resolve. In fact, 58% of the companies in the 2019 Varonis Data Risk Report had over 1,000 folders with inconsistent permissions. Most Varonis customers discover broken permissions during the Risk Assessment. Usually, you get broken inheritance from a script that overwrites ACLs and removes permissions that the child inherited from the parent. In Varonis terms, we call Folder E “Unique.” Unique means that someone added User to the ACL for Folder E so it doesn’t match the parent exactly, but all the inherited ACLs are intact.īroken inheritance happens when the child folder is missing permissions from the parent. So Folder E does not match Folder D’s permissions. The ACL for Folder E inherited the Group, but there is also a User. Folder E inherits permissions from Folder D. Take this example: Folder D is the parent – Folder E is the child. When a folder no longer inherits permissions from its parent so that ACLs on the parent and child differ, we say that the permissions are broken or unique. Problems arise when you assume folders are inheriting permissions but aren’t. In the above example, we can also say Folder B is inheriting permissions from Folder A. Inheritance is another term for permissions propagation. If someone creates Folder C as a child of either Folder A or B, User has Read access to Folder C. Permissions propagation also works for new folders. Therefore, User has Read access to Folder B. Permissions propagation is the process whereby permissions from a higher level node in a folder tree are copied to a child node further down in that same folder tree.įor example: The u ser has Read access to Folder A. 
We are going to look into permissions propagation to understand what kind of problems you could encounter, and how those problems could compromise your data security strategies.
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