Ensure no duplicate user names exist

中等級 1自動化cos

說明

Although the useradd program will not let you create a duplicate user name, it is possible for an administrator to manually edit the /etc/passwd file and change the user name. If a user is assigned a duplicate user name, it will create and have access to files with the first UID for that username in /etc/passwd . For example, if "test4" has a UID of 1000 and a subsequent "test4" entry has a UID of 2000, logging in as "test4" will use UID 1000. Effectively, the UID is shared, which is a security problem.

檢查方式

稽核方法: Shell 指令

shell

cut -d: -f1 /etc/passwd | sort | uniq -d | grep -q . && echo noncompliant || echo compliant

預期輸出: compliant

修補方式

修補方法: 操作指南或基礎設施修補檔

Based on the results of the audit script, establish unique user names for the users. File ownerships will automatically reflect the change as long as the users have unique UIDs.

屬性

作業系統: 不限
標籤: container-optimized-oscos
參考資料: CIS Google Container-Optimized OS Benchmark v1.2.0 - 6.2.18 Ensure no duplicate user names exist

檢查此主機

請在您有權稽核的機器上執行此指令。掃描為唯讀操作。

shell

tmaegis scan --target cos