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

IBM z/OS data sets for the FTP Server must be properly protected.

DISA Rule

SV-223518r533198_rule

Vulnerability Number

V-223518

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

ACF2-FT-000020

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.

Weight

10

Fix Recommendation

Review the data set access authorizations defined to the ESM for the FTP.DATA and FTP.BANNER files. Configure these data sets to be protected as follows:

The data set containing the FTP.DATA configuration file allows read access to all authenticated users and all other access is restricted to systems programming personnel.

All write and allocate access to the data set containing the FTP.DATA configuration file is logged.

The data set containing the FTP banner file allows read access to all authenticated users and all other access is restricted to systems programming personnel.

Check Contents

Refer to the FTP server Started task (usually FTPD). Refer to the data set defined on the SYSFTPD DD statement.

If the WRITE and ALLOCATE access to the data set containing the FTP Data configuration file is restricted to systems programming personnel, this is not a finding.

NOTE: READ access to all authenticated users is permitted.

If WRITE and ALLOCATE access to the data set containing the FTP Data configuration file is logged, this is not a finding.

Refer to the BANNER statement in the FTP Data configuration file. If the BANNER statement refers to an MVS data set and WRITE and ALLOCATE access to the data set containing the FTP banner file is restricted to systems programming personnel, this is not a finding.

If READ access to the data set containing the FTP banner file is permitted to all authenticated users, this is not a finding.

NOTES: The MVS data sets mentioned above are not used in every configuration. Absence of a data set will not be considered a finding.

Vulnerability Number

V-223518

Documentable

False

Rule Version

ACF2-FT-000020

Severity Override Guidance

Refer to the FTP server Started task (usually FTPD). Refer to the data set defined on the SYSFTPD DD statement.

If the WRITE and ALLOCATE access to the data set containing the FTP Data configuration file is restricted to systems programming personnel, this is not a finding.

NOTE: READ access to all authenticated users is permitted.

If WRITE and ALLOCATE access to the data set containing the FTP Data configuration file is logged, this is not a finding.

Refer to the BANNER statement in the FTP Data configuration file. If the BANNER statement refers to an MVS data set and WRITE and ALLOCATE access to the data set containing the FTP banner file is restricted to systems programming personnel, this is not a finding.

If READ access to the data set containing the FTP banner file is permitted to all authenticated users, this is not a finding.

NOTES: The MVS data sets mentioned above are not used in every configuration. Absence of a data set will not be considered a finding.

Check Content Reference

M

Target Key

4100

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