IBM z/OS TSS Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000126-GPOS-00066
<GroupDescription></GroupDescription>Group -
IBM z/OS system administrator must develop a procedure to terminate all sessions and network connections related to nonlocal maintenance when nonlocal maintenance is completed.
<VulnDiscussion> If a maintenance session or connection remains open after maintenance is completed, it may be hijacked by an attacker and us...Rule Medium Severity -
SRG-OS-000437-GPOS-00194
<GroupDescription></GroupDescription>Group -
IBM z/OS system administrator must develop a procedure to remove all software components after updated versions have been installed.
<VulnDiscussion>Previous versions of software components that are not removed from the information system after updates have been installed m...Rule Medium Severity -
SRG-OS-000447-GPOS-00201
<GroupDescription></GroupDescription>Group -
IBM z/OS system administrator must develop a procedure to shut down the information system, restart the information system, and/or notify the system administrator when anomalies in the operation of any security functions are discovered.
<VulnDiscussion>If anomalies are not acted upon, security functions may fail to secure the system. Security function is defined as the hard...Rule Medium Severity -
SRG-OS-000479-GPOS-00224
<GroupDescription></GroupDescription>Group -
IBM z/OS system administrator must develop a procedure to offload SMF files to a different system or media than the system being audited.
<VulnDiscussion>The task of allocating audit record storage capacity is usually performed during initial installation of the operating system...Rule Medium Severity -
SRG-OS-000030-GPOS-00011
<GroupDescription></GroupDescription>Group -
IBM z/OS must employ a session manager for users to directly initiate a session lock for all connection types.
<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...Rule Medium Severity -
SRG-OS-000033-GPOS-00014
<GroupDescription></GroupDescription>Group -
The SSH daemon must be configured to use a FIPS 140-2 compliant cryptographic algorithm.
<VulnDiscussion>Audit record content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destina...Rule High Severity -
SRG-OS-000096-GPOS-00050
<GroupDescription></GroupDescription>Group -
IBM z/OS SSH daemon must be configured to only use the SSHv2 protocol.
<VulnDiscussion>In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e....Rule High Severity -
SRG-OS-000080-GPOS-00048
<GroupDescription></GroupDescription>Group -
IBM z/OS permission bits and user audit bits for HFS objects that are part of the Syslog daemon component must be configured properly.
<VulnDiscussion>To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-ap...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
The IBM z/OS Syslog daemon must not be started at z/OS initialization.
<VulnDiscussion>To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
The IBM z/OS Syslog daemon must be properly defined and secured.
<VulnDiscussion>To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...Rule Medium Severity
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