Find Un-owned Files and Directories

MediumLevel 1Automatedsolaris

Description

Sometimes when administrators delete users from the password file they neglect to remove all files owned by those users from the system. A new user who is assigned the deleted user's user ID or group ID may then end up "owning" these files, and thus have more access on the system than was intended. Audit: long running; false positives may appear under /zones in the global zone.

How it is checked

Audit method: Shell command

shell

command -v find >/dev/null 2>&1 || exit 1; out=$( { find / \( -fstype nfs -o -fstype cachefs -o -fstype autofs -o -fstype ctfs -o -fstype mntfs -o -fstype objfs -o -fstype proc \) -prune -o \( -nouser -o -nogroup \) -ls ; } 2>/dev/null ); [ -z "$out" ] && echo compliant || printf '%s\n' "$out" | head -n 20

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Correct or justify any items discovered in the Audit step. Determine the existence of any files that are not attributed to current users or groups on the system, and determine the best course of action in accordance with site policy. Note that the Solaris OS is shipped with all files appropriately owned.

Properties

Operating systems: Any
Tags: solarispermissions
Reference: CIS Oracle Solaris 11.4 Benchmark v1.1.0 - 9.23 Find Un-owned Files and Directories

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target solaris