STIGQter STIGQter: STIG Summary: z/OS RACF STIG Version: 6 Release: 43 Benchmark Date: 24 Jan 2020: The VTAM USSTAB definitions are being used for unsecured terminals

DISA Rule

SV-7250r2_rule

Vulnerability Number

V-6949

Group Title

ZVTM0011

Rule Version

ZVTM0011

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

The Systems programmer and IAO will verify that USSTAB definitions are only used for secure terminals.

Only terminals that are locally attached to the host or connected to the host via secure leased lines located in a secured area. Only authorized personnel may enter the area where secure terminals are located.

USSTAB or LOGAPPL definitions are used to control logon from secure terminals. These terminals can log on directly to any VTAM application (e.g., TSO, CICS, etc.) of their choice and bypass Session Manager services. Secure terminals are usually locally attached to the host or connected to the host via a private LAN without access to an external network. Only authorized personnel may enter the area where secure terminals are located.

Check Contents

a) Have the IAO and VTAM Systems Programmer supply the following information:

- Documentation regarding terminal naming standards.
- Documentation of all procedures controlling terminal logons to the system.
- A complete list of all USS commands used by terminal users to log on to the system.
- Members and data set names containing USSTAB and LOGAPPL definitions of all terminals that can log on to the system (e.g., SYS1.VTAMLST).
- Members and data set names containing logon mode parameters.

b) If USSTAB definitions are only used for secure terminals (e.g., terminals that are locally attached to the host or connected to the host via secure leased lines), there is NO FINDING.

c) If USSTAB definitions are used for any unsecured terminals (e.g., dial up terminals or terminals attached to the Internet such as TN3270 or KNET 3270 emulation), this is a FINDING.

Vulnerability Number

V-6949

Documentable

False

Rule Version

ZVTM0011

Severity Override Guidance

a) Have the IAO and VTAM Systems Programmer supply the following information:

- Documentation regarding terminal naming standards.
- Documentation of all procedures controlling terminal logons to the system.
- A complete list of all USS commands used by terminal users to log on to the system.
- Members and data set names containing USSTAB and LOGAPPL definitions of all terminals that can log on to the system (e.g., SYS1.VTAMLST).
- Members and data set names containing logon mode parameters.

b) If USSTAB definitions are only used for secure terminals (e.g., terminals that are locally attached to the host or connected to the host via secure leased lines), there is NO FINDING.

c) If USSTAB definitions are used for any unsecured terminals (e.g., dial up terminals or terminals attached to the Internet such as TN3270 or KNET 3270 emulation), this is a FINDING.

Check Content Reference

M

Responsibility

Systems Programmer

Target Key

106

Comments