IBM z/OS TSS Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000066-GPOS-00034
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SRG-OS-000066-GPOS-00034
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SRG-OS-000104-GPOS-00051
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SRG-OS-000080-GPOS-00048
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CA-TSS Security control ACIDs must be limited to the administrative authorities authorized and that require these privileges to perform their job duties.
The use of security policy filters provides protection for the confidentiality of data by restricting the flow of data. A crucial part of any flow control solution is the ability to configure polic...Rule High Severity -
SRG-OS-000080-GPOS-00048
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SRG-OS-000001-GPOS-00001
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SRG-OS-000021-GPOS-00005
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SRG-OS-000021-GPOS-00005
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The CA-TSS NPPTHRESH Control Option must be properly set.
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
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SRG-OS-000057-GPOS-00027
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SRG-OS-000063-GPOS-00032
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SRG-OS-000067-GPOS-00035
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SRG-OS-000069-GPOS-00037
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The CA-TSS NEWPHRASE and PPSCHAR Control Options must be properly set.
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...Rule Medium Severity -
SRG-OS-000071-GPOS-00039
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The CA-TSS NEWPW control options must be properly set.
If the private key is stolen, this will lead to the compromise of the authentication and nonrepudiation gained through PKI because the attacker can use the private key to digitally sign documents a...Rule Medium Severity -
SRG-OS-000073-GPOS-00041
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IBM z/OS must use NIST FIPS-validated cryptography to protect passwords in the security database.
Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily c...Rule High Severity -
SRG-OS-000076-GPOS-00044
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The CA-TSS PWEXP Control Option must be set to 60.
Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force user...Rule Medium Severity -
SRG-OS-000076-GPOS-00044
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The CA-TSS PPEXP Control Option must be properly set.
Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force user...Rule Medium Severity -
SRG-OS-000077-GPOS-00045
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The CA-TSS PWHIST Control Option must be set to 10 or greater.
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user...Rule Medium Severity -
SRG-OS-000077-GPOS-00045
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The CA-TSS PPHIST Control Option must be properly set.
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user...Rule Medium Severity -
SRG-OS-000080-GPOS-00048
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SRG-OS-000080-GPOS-00048
Group -
SRG-OS-000080-GPOS-00048
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CA-TSS must limit Write or greater access to SYS1.IMAGELIB to system programmers only.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule High Severity -
SRG-OS-000080-GPOS-00048
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SRG-OS-000080-GPOS-00048
Group -
CA-TSS must limit WRITE or greater access to all APF-authorized libraries to system programmers only.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule High Severity -
SRG-OS-000080-GPOS-00048
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SRG-OS-000080-GPOS-00048
Group -
SRG-OS-000080-GPOS-00048
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CA-TSS must limit Write or greater access to SYS1.NUCLEUS to system programmers only.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule High Severity -
SRG-OS-000080-GPOS-00048
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CA-TSS must limit Write or greater access to libraries that contain PPT modules to system programmers only.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule Low Severity -
SRG-OS-000080-GPOS-00048
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SRG-OS-000080-GPOS-00048
Group -
CA-TSS security data sets and/or databases must be properly protected.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule High Severity -
SRG-OS-000080-GPOS-00048
Group -
SRG-OS-000080-GPOS-00048
Group -
SRG-OS-000080-GPOS-00048
Group -
CA-TSS must limit WRITE or greater access to all system-level product installation libraries to system programmers only.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule Medium Severity -
SRG-OS-000080-GPOS-00048
Group -
CA-TSS must limit WRITE or greater access to the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) to system programmers only.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be...Rule Medium Severity
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