Ensure access to the su command is restricted

中级别 1人工审核cos

说明

The su command allows a user to run a command or shell as another user. The program has been superseded by sudo , which allows for more granular control over privileged access. Normally, the su command can be executed by any user. By uncommenting the pam_wheel.so statement in /etc/pam.d/su , the su command will only allow users in the wheel group to execute su . Restricting the use of su , and using sudo in its place, provides system administrators better control of the escalation of user privileges to execute privileged commands. The sudo utility also provides a better logging and audit mechanism, as it can log each command executed via sudo , whereas su can only record that a user executed the su program.

检查方式

审计方法: 人工审核

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Run the following command and verify output includes matching line: # grep pam_wheel.so /etc/pam.d/su auth required pam_wheel.so use_uid Run the following command and verify users in wheel group match site policy: # grep wheel /etc/group wheel:!:10:root,<user list>

修复方式

修复方法: 操作指南或基础设施补丁

Add the following line to the /etc/pam.d/su file: auth required pam_wheel.so use_uid Create a comma separated list of users in the wheel statement in the /etc/group file: wheel:!:10:root,<user list> /etc is stateless on Container-Optimized OS. Therefore, /etc cannot be used to make these changes persistent across reboots. The steps mentioned above needs to be performed after every boot.

属性

操作系统: 任意
标签: access-controlcontainer-optimized-oscos
参考: CIS Google Container-Optimized OS Benchmark v1.2.0 - 5.5 Ensure access to the su command is restricted