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The IBM z/OS must employ a session manager that conceals, via the session lock, information previously visible on the display with a publicly viewable image.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-223794RACF-OS-000400SV-223794r958404_ruleCCI-000060medium
Description
A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. The operating system session lock event must include an obfuscation of the display screen so as to prevent other users from reading what was previously displayed. Publicly viewable images can include static or dynamic images, for example, patterns used with screen savers, photographic images, solid colors, a clock, a battery life indicator, or a blank screen, with the additional caveat that none of the images convey sensitive information.
STIGDate
IBM z/OS RACF Security Technical Implementation Guide2026-06-03

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-24.1Pattern-Hiding Displays
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (15) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-11Device Lock
1.00
AC-11(1)Pattern-hiding Displays
1.00
AC-12Session Termination
1.00
AU-10Non-repudiation
1.00
IA-11Re-authentication
1.00
IA-2Identification and Authentication (Organizational Users)
1.00
IA-2(1)Multi-factor Authentication to Privileged Accounts
1.00
IA-2(12)Acceptance of PIV Credentials
1.00
IA-2(2)Multi-factor Authentication to Non-privileged Accounts
1.00
IA-2(3)Local Access to Privileged Accounts
1.00

+5 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.10
1.00
CCI1 mapping
CCI-000060
1.00

Details

Check Text (C-223794r958404_chk)

Ask the system administrator for the configuration parameters for the session manager in use. If there is no session manager in use, this is a finding. If the session manager is not configure to conceal, via the session lock, information previously visible on the display with a publicly viewable image, this is a finding.

Fix Text (F-25455r515071_fix)

Configure the session manager to conceal, via the session lock, information previously visible on the display with a publicly viewable image.