STIGQter: STIG Summary: IBM z/OS ACF2 Security Technical Implementation Guide Version: 8 Release: 2 Benchmark Date: 23 Apr 2021:

IBM z/OS SNTP daemon (SNTPD) permission bits must be properly configured.

DISA Rule

SV-223551r533198_rule

Vulnerability Number

V-223551

Group Title

SRG-OS-000355-GPOS-00143

Rule Version

ACF2-OS-000150

Severity

CAT II

CCI(s)

• CCI-001891 - The information system compares internal information system clocks on an organization-defined frequency with an organization-defined authoritative time source.

Weight

10

Fix Recommendation

With the assistance of a systems programmer with UID(0) and/or SUPERUSER access, configure the UNIX permission bits and user audit bits on the SNTPD to conform to the specifications below:

/usr/sbin/sntpd 1740 faf

Check Contents

From the ISPF Command Shell enter:
cd /usr/sbin
ls -al

If the following File permission and user Audit Bits are true, this is not a finding.

/usr/sbin/sntpd 1740 faf

The following represents a hierarchy for permission bits from least restrictive to most restrictive:

7 rwx (least restrictive)
6 rw-
3 -wx
2 -w-
5 r-x
4 r--
1 --x
0 --- (most restrictive)

The possible audit bits settings are as follows:
f log for failed access attempts
a log for failed and successful access
- no auditing

Vulnerability Number

V-223551

Documentable

False

Rule Version

ACF2-OS-000150

Severity Override Guidance

From the ISPF Command Shell enter:
cd /usr/sbin
ls -al

If the following File permission and user Audit Bits are true, this is not a finding.

/usr/sbin/sntpd 1740 faf

The following represents a hierarchy for permission bits from least restrictive to most restrictive:

7 rwx (least restrictive)
6 rw-
3 -wx
2 -w-
5 r-x
4 r--
1 --x
0 --- (most restrictive)

The possible audit bits settings are as follows:
f log for failed access attempts
a log for failed and successful access
- no auditing

Check Content Reference

M

Target Key

4100

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