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III - Administrative Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000047-GPOS-00023

    <GroupDescription></GroupDescription>
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  • IBM z/OS NOBUFFS in SMFPRMxx must be properly set (Default is MSG).

    &lt;VulnDiscussion&gt;It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mit...
    Rule Medium Severity
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  • SRG-OS-000355-GPOS-00143

    <GroupDescription></GroupDescription>
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  • IBM z/OS SNTP daemon (SNTPD) permission bits must be properly configured.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000355-GPOS-00143

    <GroupDescription></GroupDescription>
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  • IBM z/OS SNTP daemon (SNTPD) must be active.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000356-GPOS-00144

    <GroupDescription></GroupDescription>
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  • IBM z/OS PARMLIB CLOCKxx must have the Accuracy PARM coded properly.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000057-GPOS-00027

    <GroupDescription></GroupDescription>
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  • IBM z/OS SMF collection files (i.e., SYS1.MANx) access must be limited to appropriate users and/or batch jobs that perform SMF dump processing.

    &lt;VulnDiscussion&gt;SMF data collection is the system activity journaling facility of the z/OS system. Unauthorized access could result in the co...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • IBM z/OS PASSWORD data set and OS passwords must not be used.

    &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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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • IBM z/OS must configure system waittimes to protect resource availability based on site priorities.

    &lt;VulnDiscussion&gt;Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • IBM z/OS Emergency LOGONIDs must be properly defined.

    &lt;VulnDiscussion&gt;Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours c...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • IBM z/OS DFSMS control data sets must reside on separate storage volumes.

    &lt;VulnDiscussion&gt;Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the sys...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00232

    <GroupDescription></GroupDescription>
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  • IBM z/OS Policy Agent must employ a deny-all, allow-by-exception firewall policy for allowing connections to other systems.

    &lt;VulnDiscussion&gt;Failure to restrict network connectivity only to authorized systems permits inbound connections from malicious systems. It al...
    Rule Medium Severity
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  • SRG-OS-000368-GPOS-00154

    <GroupDescription></GroupDescription>
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  • Unsupported IBM z/OS system software must not be installed and/or active on the system.

    &lt;VulnDiscussion&gt;Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may pr...
    Rule High Severity
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  • SRG-OS-000368-GPOS-00154

    <GroupDescription></GroupDescription>
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  • IBM z/OS must not allow non-existent or inaccessible LINKLIST libraries.

    &lt;VulnDiscussion&gt;Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may pr...
    Rule Medium Severity
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  • SRG-OS-000368-GPOS-00154

    <GroupDescription></GroupDescription>
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  • IBM z/OS must not allow non-existent or inaccessible Link Pack Area (LPA) libraries.

    &lt;VulnDiscussion&gt;Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may pr...
    Rule Medium Severity
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  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
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  • IBM z/OS must not have inaccessible APF libraries defined.

    &lt;VulnDiscussion&gt;It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission ob...
    Rule Medium Severity
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  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
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  • IBM z/OS LNKAUTH=APFTAB must be specified in the IEASYSxx member(s) in the currently active parmlib data set(s).

    &lt;VulnDiscussion&gt;Failure to specify LINKAUTH=APFTAB allows libraries other than those designated as APF to contain authorized modules which co...
    Rule Medium Severity
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  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
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  • Duplicated IBM z/OS sensitive utilities and/or programs must not exist in APF libraries.

    &lt;VulnDiscussion&gt;Removal of unneeded or non-secure functions, ports, protocols, and services mitigate the risk of unauthorized connection of d...
    Rule Medium Severity
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  • SRG-OS-000096-GPOS-00050

    <GroupDescription></GroupDescription>
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  • IBM z/OS must properly configure CONSOLxx members.

    &lt;VulnDiscussion&gt;In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e....
    Rule Medium Severity
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  • SRG-OS-000067-GPOS-00035

    <GroupDescription></GroupDescription>
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  • IBM z/OS must use ICSF or SAF Key Rings for key management.

    &lt;VulnDiscussion&gt;If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the ne...
    Rule Medium Severity
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  • SRG-OS-000185-GPOS-00079

    <GroupDescription></GroupDescription>
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  • The IBM z/OS systems requiring data at rest protection must properly employ IBM DS8880 or equivalent hardware solutions for full disk encryption.

    &lt;VulnDiscussion&gt;Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and...
    Rule Medium Severity
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  • SRG-OS-000138-GPOS-00069

    <GroupDescription></GroupDescription>
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  • IBM z/OS sensitive and critical system data sets must not exist on shared DASD.

    &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-000420-GPOS-00186

    <GroupDescription></GroupDescription>
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  • IBM z/OS Policy agent must contain a policy that protects against or limits the effects of Denial of Service (DoS) attacks by ensuring the operating system is implementing rate-limiting measures on impacted network interfaces.

    &lt;VulnDiscussion&gt;DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot ac...
    Rule Medium Severity
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  • SRG-OS-000142-GPOS-00071

    <GroupDescription></GroupDescription>
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  • IBM z/OS Policy agent must contain a policy that manages excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of Denial of Service (DoS) attacks.

    &lt;VulnDiscussion&gt;DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot ac...
    Rule Medium Severity
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  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
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  • IBM z/OS must employ a session manager to manage retaining a users session lock until that user reestablishes access using established identification and authentication procedures.

    &lt;VulnDiscussion&gt;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
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  • SRG-OS-000363-GPOS-00150

    <GroupDescription></GroupDescription>
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  • IBM z/OS system administrator must develop a procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner.

    &lt;VulnDiscussion&gt;Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized ...
    Rule Medium Severity
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  • SRG-OS-000031-GPOS-00012

    <GroupDescription></GroupDescription>
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  • IBM z/OS must employ a session manager that conceal, via the session lock, information previously visible on the display with a publicly viewable image.

    &lt;VulnDiscussion&gt;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
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