Ensure that access to SYSIBM.SYSRESAUTH is restricted

中级别 1人工审核db2-zos

说明

The SYSIBM.SYSRESAUTH table contains a list of all users that have various privileges on an object (collections, distinct types, etc.). PUBLIC should be restricted from accessing this table. PUBLIC should not have access to this list of users. Exposing who has access to resources can enable attackers to gain access to your organization's data.

检查方式

审计方法: 人工审核

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For Db2 internal security users: Issue the following SQL statement to check if PUBLIC has access: SELECT GRANTEE FROM SYSIBM.SYSTABAUTH WHERE TCREATOR = 'SYSIBM' AND TTNAME = 'SYSRESAUTH' AND GRANTEE = 'PUBLIC'; Output that contains zero rows is considered a successful finding. Otherwise, PUBLIC has SELECT privilege and the remediation steps should be followed. For external security users: Issue the RACF RLIST command to list the profile that controls access to the SYSIBM.SYSRESAUTH table in the MDSNTB class. Examine the universal access (UACC) and user ... (full steps: CIS section 2.2.18)

修复方式

修复方法: 操作指南或基础设施补丁

For Db2 internal security users: Issue the following SQL statement to revoke access from PUBLIC: REVOKE ALL ON SYSIBM.SYSRESAUTH FROM PUBLIC; For external security users: Issue the RACF RALTER command to update the profile and change the UACC setting to NONE. Issue the RACF PERMIT command to remove the ID(*) and specify users or groups.

属性

操作系统: 任意
标签: db2-zospermissions
参考: CIS IBM Db2 13 for z/OS Benchmark v1.0.0 - 2.2.18 Ensure that access to SYSIBM.SYSRESAUTH is restricted