Find Files and Directories with Extended Attributes

MediumLevel 1Automatedsolaris

Description

Extended attributes are implemented as files in a "shadow" file system that is not generally visible via normal administration commands without special arguments. 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. Audit: automated read-only check derived from the CIS audit procedure; it prints "compliant" when the control is met.

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 -xattr -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 having extended file attributes, and determine the best course of action in accordance with site policy. Note that the Solaris OS does not ship with files that have extended attributes.

Properties

Operating systems: Any
Tags: solarispermissions
Reference: CIS Oracle Solaris 11.4 Benchmark v1.1.0 - 9.24 Find Files and Directories with Extended Attributes

Check this host

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

shell

tmaegis scan --target solaris