STIG ID - BACF1036: Limit Access to System Backup Files

Severity
: 1- High
System backup data sets are necessary for recovery of DASD resident data sets. Unauthorized access to system backup data sets could result in the compromise of your organization's operating system environment, external security manager, and customer data.
The organization must ensure that write or greater access to system backup data sets is limited to the system programmers and access is logged. If other userids are specified, ensure the Information Security System Officer (ISSO) has documented justification for the access.
This STIG article shows how to obtain the high-level indexes to backup data set names and verify that their access is restricted to system programmers and batch jobs that perform the backups.
Identify Audit Finding
Review the following data to determine if you should consider remediation.
Follow these steps
:
  1. Review access to system backup data sets and ensure the following:
    • Write or greater access is limited to system programmers and batch jobs that perform the backups
    • All access is logged.
    ACF ACCESS DSN('SYS1.backup') ACCESS Subcommand Results as of 08/07/20-4:05 for: SYS1.backup $Key: SYS1 Ruleline: BACKUP* UID(*****SYSPROG) READ(L) WRITE(L) ALLOC(L) EXEC(L) ACF
    In this example, the system programmer (SYSPROG) has read, write, and allocate access to the SYS1.backup files and all activity is logged. SYS1.MAN is the repository for newly created SMF records
  2. If write or greater access to system backup data sets are limited to system programmers and all access activity is logged,
    your organization does not have an audit finding.
  3. If write or greater access to system backup data sets is not limited to system programmers and all access activity is
    not
    logged,
    your organization has an audit finding.
    See Remediate Audit Findings.
Remediate Audit Finding
The Information System Security Officer (ISSO) is responsible for ensuring that write or greater access to SMF collection files is limited to system programmers and all activity is logged.
Follow these steps:
  1. Implement controls to specify only system programmers are authorized to write or greater access to the system backup data sets:
    RECKEY SYS1 ADD(BACKUP.- UID(*****SYSPROG) READ(L) WRITE(L) ALLOC(L) EXEC(L)
  2. Verify that the changes were made to the system backup data sets.
    ACF ACCESS DSN(SYS1.backup) ACCESS Subcommand Results as of 08/07/20-4:25 for: SYS1.backup $Key: SYS1 Ruleline: BACKUP.- UID(*****SYSPROG) READ(L) WRITE(L) ALLOC(L) EXEC(L) ACF
Implementing controls to system backup data sets protects your organization's operating system environment, external security manager, and customer data.
Control Correlation Identifier (CCI)
A Control Correlation Identifier (CCI) list provides a standard identifier and description for each of the singular, actionable statements that comprise a control or best practice. The following CCIs are related to this STIG. For more information, see the National Institute of Standards and Technology website.
CCIs
: CCI-000213
CCI
:
CCI-000213
Published Date
:
2009-09-14
Definition
:
The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies.
Type
:
technical
References
:
NIST: NIST SP 800-53 (v3): AC-3
NIST: NIST SP 800-53 Revision 4 (v4): AC-3
NIST: NIST SP 800-53A (v1): AC-3.1