Restrictive File Permissions

Files should be created with restrictive file permissions to prevent vulnerabilities such as information disclosure and code execution. In particular, any files which may contain confidential information should be set to only permit access by the owning user/service and group (i.e. no world/other access).

1. Are NTFS permissions most restrictive wins?
2. What are the three sets of permission for a file?
3. What is the difference between share and NTFS permissions?
4. What are the different file permissions?
5. What are the default NTFS permissions?
6. How do I set NTFS permissions?
7. Who can control the permission for a file?
8. How do I set permissions on a file?
9. Why there are 3 sets of permission required for each file?
10. What are the six standard NTFS permissions?
11. What do modify permissions allow?
12. What are effective permissions?

Are NTFS permissions most restrictive wins?

The most restrictive wins!

When there is a conflict between Share and NTFS permissions, the most restrictive permission applies. Whichever of the two is more restrictive is applied as the effective permission – what the user can actually do to the files and folder.

What are the three sets of permission for a file?

Access to a file has three levels:

• Read permission – If authorized, the user can read the contents of the file.
• Write permission – If authorized, the user can modify the file.
• Execute permission – If authorized, the user can execute the file as a program.

What is the difference between share and NTFS permissions?

Share permissions are the permissions you set for a folder when you share that folder. The share permissions determine the type of access others have to the shared folder across the network. ... NTFS permissions determine the action users can take for a folder or file both across the network and locally.

What are the different file permissions?

There are four categories (System, Owner, Group, and World) and four types of access permissions (Read, Write, Execute and Delete). The categories are not mutually disjoint: World includes Group, which in turn includes Owner.

What are the default NTFS permissions?

By default, the “Everyone” group is assigned “Read” permissions. Change — Users can do everything allowed by the “Read” permission, as well as add files and subfolders, change data in files, and delete subfolders and files. This permission is not assigned by default.

How do I set NTFS permissions?

NTFS permissions

1. Open Windows Explorer. ...
2. Expand My Computer.
3. Right-click %systemroot%, and then click Properties.
4. Click the Security tab, and then click Advanced.
5. Double-click Permission, and then select the appropriate setting from the Apply Onto list.

Who can control the permission for a file?

You must be superuser or the owner of a file or directory to change its permissions. You can use the chmod command to set permissions in either of two modes: Absolute Mode – Use numbers to represent file permissions.

How do I set permissions on a file?

Browse the folder or file that you wish to assign permissions on, and left click to select it. Click “OK”. On this tab, either select an existing user and click “Edit…” or click “Add…” to add a new user to the permissions. Use the drop-down menu in the “Apply to” field to assign selected permissions to desired folders.

Why there are 3 sets of permission required for each file?

– Each file or directory has three permission sets for the three types of permission groups. – The first permission set represents the owner permissions, the second set represents the group permissions, and the last set represents the other permissions. ... You can list the directory contents with the ls command.

What are the six standard NTFS permissions?

These standard file and folder permissions are actually composed of various groupings of six NTFS special permissions:

• read (R)
• write (W)
• execute (X)
• delete (D)
• change permission (P)
• take ownership (O)

What do modify permissions allow?

Modify permission allows you to do anything that Read permission allows, it also add the ability to add files and subdirectories, delete subfolders and change data in the files.

What are effective permissions?

Effective Permissions is the cumulative permissions a user has for accessing a resource based on his or her individual permissions, group permissions, and group membership.