Title

The operating system must have no files with extended attributes. (Cat III impact)

Discussion

Attackers or malicious users could hide information, exploits, etc. in extended attribute areas. Since extended attributes are rarely used, it is important to find files with extended attributes set and correct these attributes.

Check Content

The root role is required. Identify all files with extended attributes. # find / \( -fstype nfs -o -fstype cachefs -o -fstype autofs \ -o -fstype ctfs -o -fstype mntfs -o -fstype objfs \ -o -fstype proc \) -prune -o -xattr -ls If output is produced, this is a finding.

Fix Text

The root role is required. Correct or justify any items discovered in the Check step. Determine the existence of any files having extended file attributes, and determine the best course of action in accordance with site policy. Remove the files or the extended attributes.

Additional Identifiers

Rule ID: SV-216200r603268_rule

Vulnerability ID: V-216200

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.