Ensure access to /var/spool/clientmqueue is configured

MediumLevel 1Automatedaix

Description

The recommended DAC (discretionary access control) settings for the /var/spool/clientmqueue directory are applied. Queued messages are the messages that have not yet reached their final destination. To ensure the integrity of the messages during storage, the mail queue directory must be secured from unauthorized access. Audit: compares `ls -ld` mode (this mode or more restrictive), owner and group with the CIS values; ACLs are not evaluated.

How it is checked

Audit method: Shell command

shell

r=compliant; for f in /var/spool/clientmqueue/; do if [ -e "$f" ]; then set -- $(ls -ld "$f"); s=$(printf '%s %s %s\n' "$1" "$3" "$4" | awk -v m='rwxrwx---' -v o='smmsp' -v g='smmsp' '{ok=1; for(i=1;i<=9;i++) if(substr(m,i,1)=="-" && substr($1,i+1,1)!="-") ok=0; if(o!="" && $2 !~ ("^(" o ")$")) ok=0; if(g!="" && $3 !~ ("^(" g ")$")) ok=0; print (ok ? "ok" : $0)}'); [ "$s" = ok ] || r="$f: $s"; else r="$f: missing"; fi; done; echo "$r"

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Set the recommended permissions and ownership on /var/spool/mqueue: chmod ug=rwx,o= /var/spool/clientmqueue chown smmsp.smmsp /var/spool/clientmqueue

Properties

Operating systems: Any
Tags: aixpermissions
Reference: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.4.4 Ensure access to /var/spool/clientmqueue is configured

Check this host

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

shell

tmaegis scan --target aix