Title

Write or greater access to SYS1.LPALIB must be limited to system programmers only. (Cat I impact)

Discussion

SYS1.LPALIB is automatically APF-authorized during IPL processing and can contain SVCs. LPA modules, once loaded into the Link Pack Area, are capable of performing APF-authorized functions. This authorization allows a program to bypass various levels of security checking. Unauthorized access could result in the compromise of the operating system environment, ACP, and customer data.

Check Content

a) Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(LPARPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ACP00050) ___ The ACP data set rules for SYS1.LPALIB allow inappropriate access. ___ The ACP data set rules for SYS1.LPALIB do not restrict UPDATE and/or ALTER access to only z/OS systems programming personnel. ___ The ACP data set rules for SYS1.LPALIB do not specify that all (i.e., failures and successes) UPDATE and/or ALTER access will be logged. b) If all of the above are untrue, there is NO FINDING. c) If any of the above is true, this is a FINDING.

Fix Text

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect SYS1.LPALIB. The IAO will ensure that update and allocate access to SYS1.LPALIB is limited to system programmers only and all update and allocate access is logged.

Additional Identifiers

Rule ID: SV-112r3_rule

Vulnerability ID: V-112

Group Title: ACP00050

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.