The IBM z/OS SNTP daemon (SNTPD) must be active.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-224023	TSS0-OS-000270	SV-224023r877863_rule		Medium

Description
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Organizations should consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).

Description

Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Organizations should consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).

STIG	Date
IBM z/OS TSS Security Technical Implementation Guide	2023-03-20

Details

Check Text ( C-25696r868993_chk )
From UNIX System Services ISPF Shell, navigate to ribbon select tools. Select option 1 - Work with Processes. If SNTP Daemon (SNTPD) is not active, this is a finding.

Fix Text (F-25684r868994_fix)
Obtain a copy of this sample procedure from SEZAINST and store it in one of your PROCLIB concatenation data sets. Perform the following step to start SNTPD as a procedure: Invoke the procedure using the system operator start command. The following sample, SEZAINST(SNTPD), shows how to start SNTPD as a procedure: //* //* Sample procedure for the Simple Network Time Protocol (SNTP) //* //* z/OS Communications Server Version 1 Release 13 //* SMP/E Distribution Name: SEZAINST(EZASNPRO) //* //* Copyright: Licensed Materials - Property of IBM //* 5650-ZOS //* Copyright IBM Corp. 2002, 2015 //* //* Status: CSV2R2 //* //SNTPD EXEC PGM=SNTPD,REGION=4096K,TIME=NOLIMIT, // PARM='/ -d' //SYSPRINT DD SYSOUT=,DCB=(RECFM=F,LRECL=132,BLKSIZE=132) //SYSIN DD DUMMY //SYSERR DD SYSOUT= //SYSOUT DD SYSOUT=,DCB=(RECFM=F,LRECL=132,BLKSIZE=132) //CEEDUMP DD SYSOUT= //SYSABEND DD SYSOUT=*

Fix Text (F-25684r868994_fix)

Obtain a copy of this sample procedure from SEZAINST and store it in one of your PROCLIB concatenation data sets.

Perform the following step to start SNTPD as a procedure:
Invoke the procedure using the system operator start command. The following sample, SEZAINST(SNTPD), shows how to start SNTPD as a procedure:
//*
//* Sample procedure for the Simple Network Time Protocol (SNTP)
//*
//* z/OS Communications Server Version 1 Release 13
//* SMP/E Distribution Name: SEZAINST(EZASNPRO)
//*
//* Copyright: Licensed Materials - Property of IBM
//* 5650-ZOS
//* Copyright IBM Corp. 2002, 2015
//*
//* Status: CSV2R2
//*
//SNTPD EXEC PGM=SNTPD,REGION=4096K,TIME=NOLIMIT,
// PARM='/ -d'
//SYSPRINT DD SYSOUT=*,DCB=(RECFM=F,LRECL=132,BLKSIZE=132)
//SYSIN DD DUMMY
//SYSERR DD SYSOUT=*
//SYSOUT DD SYSOUT=*,DCB=(RECFM=F,LRECL=132,BLKSIZE=132)
//CEEDUMP DD SYSOUT=*
//SYSABEND DD SYSOUT=*