STIGQter: STIG Summary: IBM z/OS RACF Security Technical Implementation Guide Version: 8 Release: 3 Benchmark Date: 23 Apr 2021:

IBM z/OS UNIX resources must be protected in accordance with security requirements.

DISA Rule

SV-223844r604139_rule

Vulnerability Number

V-223844

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

RACF-US-000070

Severity

CAT II

CCI(s)

• CCI-000213 - The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies.
• CCI-002233 - The information system prevents organization-defined software from executing at higher privilege levels than users executing the software.

Weight

10

Fix Recommendation

SURROGAT class BPX resources are used in conjunction with server applications that are performing tasks on behalf of client users that may not supply an authenticator to the server. This can be the case when clients are otherwise validated or when the requested service is performed from userids representing groups.

Configure the default access for each BPX.SRV.userid resource must be no access. Access can be permitted only to system software processes that act as servers under z/OS UNIX (e.g., web servers) and users whose access and approval are identified in the Site Security Plan.

A sample is provided here:

RDEF SURROGAT BPX.SRV.user UACC(NONE) OWNER(ADMIN) AUDIT(ALL(READ))

-RACF rules for all BPX.SRV.user SURROGAT resources must restrict access to system software processes (e.g., web servers) that act as servers under z/OS UNIX.

RDEF SURROGAT BPX.SRV.user UACC(NONE) OWNER(ADMIN) AUDIT(ALL(READ))
PE BPX.SRV.user CL(SURROGAT) ID(<server>)

Check Contents

From the ISPF Command Shell enter:
RL SURROGAT BPX.SRV AUTHUSER

If the RACF rules for all BPX.SRV.user SURROGAT resources specify a default access of NONE, this is not a finding.

If the RACF rules for all BPX.SRV.user SURROGAT resources restrict access to system software processes (e.g., web servers) that act as servers under z/OS UNIX, this is not a finding.

If the RACF rules for all BPX.SRV.user SURROGAT resources restrict access to authorized users identified in the Site Security Plan, this is not a finding.

Vulnerability Number

V-223844

Documentable

False

Rule Version

RACF-US-000070

Severity Override Guidance

From the ISPF Command Shell enter:
RL SURROGAT BPX.SRV AUTHUSER

If the RACF rules for all BPX.SRV.user SURROGAT resources specify a default access of NONE, this is not a finding.

If the RACF rules for all BPX.SRV.user SURROGAT resources restrict access to system software processes (e.g., web servers) that act as servers under z/OS UNIX, this is not a finding.

If the RACF rules for all BPX.SRV.user SURROGAT resources restrict access to authorized users identified in the Site Security Plan, this is not a finding.

Check Content Reference

M

Target Key

4101

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