None Computing title z/OS ROSCOE for TSS Security Technical Implementation Guide version 7 releaseinfo Release: 2 Vuln_Num V-225598 Rule_ID SV-225598r1146367_rule Severity medium Rule_Title ROSCOE install data sets are not properly protected. Vuln_Discuss ROSCOE install data sets provide the capability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to their data sets could result in violating the integrity of the base product, which could result in compromising the operating system or sensitive data. Check_Content Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(ROSRPT). Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZROS0000). Verify that access to the ROSCOE Install data sets are properly restricted. If the following guidance is true, this is not a finding. The TSS data set rules for the data sets restrict WRITE and/or greater access to systems programming personnel. The TSS data set rules for the data sets specify that all (i.e., failures and successes) WRITE and/or greater access will be logged. Fix_Text The ISSO will ensure that WRITE and/or greater access to program product data sets is limited to systems programmers only, and all WRITE and/or greater access is logged. Security Personnel and Auditors should have READ access. The installing systems programmer will identify and document the product data sets and categorize them according to who will have WRITE and/or greater access and if required that all WRITE and/or greater access is logged. The installing systems programmer will identify if any additional groups have UPDATE access for specific data sets, and once documented will work with the ISSO to ensure they are properly restricted to the Access Control Program (ACP) active on the system. Data sets to be protected will be: SYS2.ROSCOE SYS2A.ROSCOE SYS3.ROSCOE SYS3A.ROSCOE The following commands are provided as a sample for implementing data set controls: TSS PERMIT(syspaudt) DSN(SYS2.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS2.ROSCOE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(secaaudt) DSN(SYS2.ROSCOE.) ACCESS(R) TSS PERMIT(audtaudt) DSN(SYS2.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS2A.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS2A.ROSCOE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(secaaudt) DSN(SYS2A.ROSCOE.) ACCESS(R) TSS PERMIT(audtaudt) DSN(SYS2A.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS3.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS3.ROSCOE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(secaaudt) DSN(SYS3.ROSCOE.) ACCESS(R) TSS PERMIT(audtaudt) DSN(SYS3.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS3A.ROSCOE.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS3A.ROSCOE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(secaaudt) DSN(SYS3A.ROSCOE.) ACCESS(R) TSS PERMIT(audtaudt) DSN(SYS3A.ROSCOE.) ACCESS(R) Not_Reviewed Vuln_Num V-225599 Rule_ID SV-225599r1146130_rule Severity medium Rule_Title ROSCOE STC data sets are not properly protected. Vuln_Discuss ROSCOE STC data sets provide the capability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to their data sets could result in violating the integrity of the base product which could result in compromising the operating system or sensitive data. Check_Content Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(ROSSTC). Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZROS0001). Verify that access to the ROSCOE STC data sets are properly restricted. The data sets in this group are the data sets identified in the ROSACTxx (if used), ROSLIBxx, and SYSAWSx DD statements of the STC or batch JCL. If the following guidance is true, this is not a finding. The TSS data set rules for the data sets restrict WRITE and/or greater access to systems programming personnel. The TSS data set rules for the data sets restrict WRITE and/or greater access to the product STC(s) and/or batch job(s). Fix_Text The ISSO will ensure that WRITE and/or greater/create access to the ROSCOE started task or batch job data sets is limited to systems programmers and the started task only and all WRITE and/or greater/create access is logged. The ISSO will ensure that all other accesses to the ROSCOE started task or batch job data sets are properly restricted and all required accesses are properly logged. Data sets to be protected will be SYS3.ROSCOE.SYS** SYS3.ROSCOE.ROSLIB** The following commands are provided as a sample for implementing data set controls: TSS ADD(SYS3) DSN(SYS3) TSS PER(syspaudt) DSN(SYS3.ROSCOE.SYS) ACC(R) TSS PER(syspaudt) DSN(SYS3.ROSCOE.SYS) ACC(A) ACTION(AUDIT) TSS PER(roscoe stc) DSN(SYS3.ROSCOE.SYS) ACC(R) TSS PER(roscoe stc) DSN(SYS3.ROSCOE.SYS) ACC(A) ACTION(AUDIT) TSS PER(syspaudt) DSN(SYS3.ROSCOE.ROSLIB) ACC(R) TSS PER(syspaudt) DSN(SYS3.ROSCOE.ROSLIB) ACC(A) ACTION(AUDIT) TSS PER(roscoe stc) DSN(SYS3.ROSCOE.ROSLIB) ACC(R) TSS PER(roscoe stc) DSN(SYS3.ROSCOE.ROSLIB) ACC(A) ACTION(AUDIT) Not_Reviewed Vuln_Num V-225600 Rule_ID SV-225600r1146132_rule Severity medium Rule_Title ROSCOE resources must be properly defined and protected. Vuln_Discuss ROSCOE can run with sensitive system privileges, and potentially can circumvent system controls. Failure to properly control access to product resources could result in the compromise of the operating system environment, and compromise the confidentiality and integrity of customer data. Many utilities assign resource controls that can be granted to systems programmers only in greater than read authority. Resources are also granted to certain non systems personnel with read only authority. Check_Content Refer to the following report produced by the TSS Data Collection and Data Set and Resource Data Collection: - SENSITVE.RPT(ZROS0020). Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZROS0020). Ensure all ROSCOE resources and/or generic equivalent are properly protected according to the requirements specified in CA ROSCOE Resources table in the z/OS STIG Addendum. Note: Wherever an access or user group is missing, use the Site Security Plan to determine access and/or user group. If the following guidance is true, this is not a finding. The TSS resources and/or generic equivalent as designated in the above table are owned or DEFPROT is specified for the resource class. The TSS resource access authorizations restrict access to the appropriate personnel as designated in the above table. The TSS resource logging is specified as designated in the above table. Fix_Text The ISSO will work with the systems programmer to verify that the following are properly specified in the Access Control Program (ACP). (Note: The resources and/or resource prefixes identified below are examples of a possible installation. The actual resources and/or resource prefixes are determined when the product is actually installed on a system through the product's installation guide and can be site specific.) Ensure that all ROSCOE resources and/or generic equivalent are properly protected according to the requirements specified in CA ROSCOE Resources table in the z/OS STIG Addendum. Use CA ROSCOE Resources table in the z/OS STIG Addendum. This table lists the resources, access requirements, and logging requirements for ROSCOE ensure the following guidelines are followed: The TSS resources and/or generic equivalent as designated in the above table are owned or DEFPROT is specified for the resource class. The TSS resource access authorizations restrict access to the appropriate personnel as designated in the above table. The TSS resource logging is specified as designated in the above table. The following commands are provided as a sample for implementing resource controls: TSS ADD(dept-acid) ROSRES(rosid) TSS PERMIT(ALL) ROSRES(rosid.ROSCMD.ETSO) ACCESS(READ) TSS PERMIT(syspaudt) ROSRES(rosid.ROSCMD.MONITOR.) ACCESS(ALL) TSS PERMIT(syspaudt) ROSRES(rosid.ROSCMD.MONITOR.AMS) ACCESS(ALL) TSS PERMIT(ALL) ROSRES(rosid.ROSCMD.MONITOR.AMS) ACCESS(READ) TSS PERMIT(syspaudt) ROSRES(rosid.ROSCMD.) ACCESS(ALL) Not_Reviewed Vuln_Num V-225601 Rule_ID SV-225601r1146135_rule Severity medium Rule_Title ROSCOE Started Task name is not properly identified/defined to the system ACP. Vuln_Discuss Products that require a started task will require that the started task be restricted to certain resources, data sets, and other system functions. Defining the started task as a userid to the system ACP allows the ACP to control the access and authorized users that require these capabilities. Failure to properly control these capabilities could compromise the operating system environment, ACP, and customer data. Check_Content Refer to the following report produced by the TSS Data Collection: - TSSCMDS.RPT(@ACIDS). Review ROSCOE STC/Batch ACID(s). If the following attributes are defined, this is not a finding. FACILITY(STC, BATCH) PASSWORD(xxxxxxxx,0) SOURCE(INTRDR) NOSUSPEND MASTFAC(ROSCOE) Fix_Text The ROSCOE systems programmer and the ISSO will ensure that a product's Started Task(s) is properly identified/defined to the system ACP. If the product requires a Started Task, verify that it is properly defined to the system ACP with the proper attributes. Most installation manuals will indicate how the Started Task is identified and any additional attributes that must be specified. A sample is provided here: TSS CREATE(ROSCOE) TYPE(USER) - NAME('*STC* for ROSCO') DEPT(xxxx) - FAC(STC) - MASTFAC(ROSCOE) PASS(xxxxxxxx,0) - SOURCE(INTRDR) NOSUSPEND Not_Reviewed Vuln_Num V-225602 Rule_ID SV-225602r1146138_rule Severity medium Rule_Title ROSCOE Started task(s) must be properly defined to the Started Task Table ACID for Top Secret. Vuln_Discuss Access to product resources should be restricted to only those individuals responsible for the application connectivity and who have a requirement to access these resources. Improper control of product resources could potentially compromise the operating system, ACP, and customer data. Check_Content Refer to the following report produced by the TSS Data Collection: - TSSCMDS.RPT(#STC). Automated Analysis Refer to the following report produced by the TSS Data Collection: - PDI(ZROS0032). If the ROSCOE started task(s) is (are) defined in the TSS STC record, this is not a finding. Fix_Text The ROSCOE systems programmer and the ISSO will ensure that a product's started task(s) is (are) properly identified and/or defined to the system ACP. A unique ACID must be assigned for the ROSCOE started task(s) through a corresponding STC table entry. The following sample set of commands is shown here as a guideline: TSS ADD(STC) PROCNAME(ROSCOE) ACID(ROSCOE) Not_Reviewed Vuln_Num V-225603 Rule_ID SV-225603r1146141_rule Severity medium Rule_Title ROSCOE is not properly defined to the Facility Matrix Table for Top Secret. Vuln_Discuss Improperly defined security controls for the Product could result in the compromise of the network, operating system, and customer data. *****This vulnerability only applies to Top Secret started tasks. ***** Check_Content Refer to the following reports produced by the TSS Data Collection: - TSSCMDS.RPT(FACLIST) - Preferred report containing all control option values in effect including default values. - TSSCMDS.RPT(TSSPRMFL) - Alternate report containing only control option values explicitly coded at TSS startup. Note: The FACLIST report must be created by DECC security personnel. The TSSPRMFL report can be used if DECC security personnel have not executed the required steps documented in the TSS Data Collection. Review the FACLIST report. If the Product Facility is properly defined as specified by the product systems programmer, this is not a finding. Fix_Text The Facility ROSCOE comes predefined with CA-TSS. Please ensure you add the following to your TSS parmlib for the FAC(ROSCOE): **** **** ROSCOE * **** FACILITY(ROSCOE=NOLUMSG,NORNDPW) Not_Reviewed Vuln_Num V-225604 Rule_ID SV-225604r1146143_rule Severity medium Rule_Title Resource Class ROSRES is not defined or active in the Access Control Program (ACP). Vuln_Discuss Failure to use a robust ACP to control a product could potentially compromise the integrity and availability of the MVS operating system and user data. Check_Content Refer to the following report produced by the ACP Data Collection: - TSSCMDS.RPT(#RDT). If the ROSCOE Resource Class(es) is (are) defined in the Resource Definition Table (RDT) as follows, this is not a finding. RESOURCE CLASS = ROSRES RESOURCE CODE = X'hex code' ATTRIBUTE = MASK|NOMASK,MAXOWN(08),MAXPERMIT(044),ACCESS,DEFPROT ACCESS = NONE(0000),CONTROL(0400),UPDATE(6000),READ(4000) ACCESS = WRITE(2000),ALL(FFFF) DEFACC = READ Fix_Text The ISSO will ensure the Product resource class(es) is (are) defined in the TSS RDT. The ISSO will issue one of the following commands to define the Product resource class(es): TSS REPLACE(RDT) RESCLASS(ROSRES) - MAXLEN(044) - ATTR(MASK|NOMASK,DEFPROT) - ACLST(NONE(0000),CONTROL(0400),UPDATE(6000),READ(4000),WRITE(2000),ALL(FFFF)) - DEFACC(READ) TSS ADDTO(RDT) RESCLASS(ROSRES) - RESCODE(hex-code) - ATTR(MASK|NOMASK,DEFPROT) - ACLST(NONE(0000),CONTROL(0400),UPDATE(6000),READ(4000),WRITE(2000),ALL(FFFF)) - DEFACC(READ) Not_Reviewed Vuln_Num V-225605 Rule_ID SV-225605r1146146_rule Severity medium Rule_Title ROSCOE configuration/parameter values are not specified properly. Vuln_Discuss Product configuration/parameters control the security and operational characteristics of products. If these parameter values are improperly specified, security and operational controls may be weakened. This exposure may threaten the availability of the product applications, and compromise the confidentiality of customer data. Check_Content Have the product systems programmer display the configuration/parameter control statements used in the current running product to define or enable security. This information is located in the SYSIN DD statement in the JCL of the STC/Batch job. Automated Analysis Refer to the following report produced by the z/OS Data Collection: - PDI(ZROS0040). If the following keywords specify the values in the ROSCOE configuration/parameter control member, this is not a finding. Keyword Value EXTSEC TSS ACFEXT YES CLLEXT YES JOBEXT YES LIBEXT YES MONEXT YES PRVEXT YES RPFEXT YES UPSEXT YES Fix_Text The product systems programmer will verify that any configuration/parameters that are required to control the security of the product are properly configured and syntactically correct. Refer to the required parameters below: Example Keyword Value EXTSEC TSS ACFEXT YES CLLEXT YES JOBEXT YES LIBEXT YES MONEXT YES PRVEXT YES RPFEXT YES UPSEXT YES Not_Reviewed