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IBM z/OS ACF2 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
    Group
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  • CA-ACF2 defined user accounts must uniquely identify system users.

    &lt;VulnDiscussion&gt;To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...
    Rule Medium Severity
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  • SRG-OS-000118-GPOS-00060

    <GroupDescription></GroupDescription>
    Group
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  • CA-ACF2 userids found inactive for more than 35 days must be suspended.

    &lt;VulnDiscussion&gt;Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potenti...
    Rule Medium Severity
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  • SRG-OS-000266-GPOS-00101

    <GroupDescription></GroupDescription>
    Group
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  • CA-ACF2 PWPHRASE GSO record must be properly defined.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity o...
    Rule Medium Severity
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  • SRG-OS-000266-GPOS-00101

    <GroupDescription></GroupDescription>
    Group
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  • CA-ACF2 must enforce password complexity by requiring that at least one special character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity o...
    Rule Medium Severity
    Show

  • SRG-OS-000069-GPOS-00037

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to require at least one upper-case character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...
    Rule Medium Severity
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  • SRG-OS-000071-GPOS-00039

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to require at least one numeric character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...
    Rule Medium Severity
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  • SRG-OS-000070-GPOS-00038

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to require at least one lower-case character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...
    Rule Medium Severity
    Show

  • SRG-OS-000072-GPOS-00040

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to require the change of at least 50% of the total number of characters when passwords are changed.

    &lt;VulnDiscussion&gt;If the operating system allows the user to consecutively reuse extensive portions of passwords, this increases the chances of...
    Rule Medium Severity
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  • SRG-OS-000073-GPOS-00041

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 must use NIST FIPS-validated cryptography to protect passwords in the security database.

    &lt;VulnDiscussion&gt;Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are...
    Rule High Severity
    Show

  • SRG-OS-000076-GPOS-00044

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to require a 60-day maximum password lifetime restriction.

    &lt;VulnDiscussion&gt;Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the ...
    Rule Medium Severity
    Show

  • SRG-OS-000075-GPOS-00043

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to require 24 hours/1 day as the minimum password lifetime.

    &lt;VulnDiscussion&gt;Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enfo...
    Rule Medium Severity
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  • SRG-OS-000077-GPOS-00045

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 PSWD GSO record value must be set to prohibit password reuse for a minimum of five generations or more.

    &lt;VulnDiscussion&gt;Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute...
    Rule Medium Severity
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  • SRG-OS-000079-GPOS-00047

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 TSOTWX GSO record values must be set to obliterate the logon password on TWX devices.

    &lt;VulnDiscussion&gt;To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback fr...
    Rule Medium Severity
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  • SRG-OS-000079-GPOS-00047

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 TSOCRT GSO record values must be set to obliterate the logon to ASCII CRT devices.

    &lt;VulnDiscussion&gt;To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback fr...
    Rule Medium Severity
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  • SRG-OS-000079-GPOS-00047

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 TSO2741 GSO record values must be set to obliterate the logon password on 2741 devices.

    &lt;VulnDiscussion&gt;To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback fr...
    Rule Medium Severity
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  • SRG-OS-000185-GPOS-00079

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 SECVOLS GSO record value must be set to VOLMASK(). Any local changes are justified and documented with the ISSO.

    &lt;VulnDiscussion&gt;The SECVOLS record defines the DASD and tape volumes for which CA-ACF2 provides volume-level protection. Information at rest ...
    Rule Medium Severity
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  • SRG-OS-000185-GPOS-00079

    <GroupDescription></GroupDescription>
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  • ACF2 RESVOLS GSO record value must be set to Volmask(-). Any other setting requires documentation justifying the change.

    &lt;VulnDiscussion&gt;The RESVOLS record defines DASD and mass storage volumes for which CA ACF2 is to provide protection at the data set name leve...
    Rule Medium Severity
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  • SRG-OS-000134-GPOS-00068

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 security data sets and/or databases must be properly protected.

    &lt;VulnDiscussion&gt;An isolation boundary provides access control and protects the integrity of the hardware, software, and firmware that perform...
    Rule High Severity
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  • SRG-OS-000138-GPOS-00069

    <GroupDescription></GroupDescription>
    Group
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  • ACF2 AUTOERAS GSO record value must be set to indicate that ACF2 is controlling the automatic physical erasure of VSAM or non VSAM data sets.

    &lt;VulnDiscussion&gt;Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of infor...
    Rule Medium Severity
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  • SRG-OS-000032-GPOS-00013

    <GroupDescription></GroupDescription>
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  • IBM z/OS SMF recording options for the FTP Server must be configured to write SMF records for all eligible events.

    &lt;VulnDiscussion&gt;Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to...
    Rule Medium Severity
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  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
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  • IBM z/OS data sets for the FTP Server must be properly protected.

    &lt;VulnDiscussion&gt;To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-ap...
    Rule Medium Severity
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  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
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  • IBM z/OS permission bits and user audit bits for HFS objects that are part of the FTP Server component must be properly configured.

    &lt;VulnDiscussion&gt;MVS data sets of the FTP Server provide the configuration and operational characteristics of this product. Failure to properl...
    Rule Medium Severity
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  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
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  • IBM z/OS FTP.DATA configuration statements must have a proper BANNER statement with the Standard Mandatory DoD Notice and Consent Banner.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Medium Severity
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  • SRG-OS-000228-GPOS-00088

    <GroupDescription></GroupDescription>
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  • IBM z/OS FTP.DATA configuration statements for the FTP Server must specify the BANNER statement.

    &lt;VulnDiscussion&gt;The structure and content of error messages must be carefully considered by the organization and development team. The extent...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • IBM z/OS FTP Control cards must be properly stored in a secure PDS file.

    &lt;VulnDiscussion&gt;Configuring the operating system to implement organization-wide security implementation guides and security checklists ensure...
    Rule Medium Severity
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