TMA-COS-6.2.16
Ensure no duplicate UIDs exist
MediumLevel 1Automatedcos
Description
Although the useradd program will not let you create a duplicate User ID (UID), it is possible for an administrator to manually edit the /etc/passwd file and change the UID field. Users must be assigned unique UIDs for accountability and to ensure appropriate access protections.
How it is checked
Audit method: Shell command
shell
cut -d: -f3 /etc/passwd | sort | uniq -d | grep -q . && echo noncompliant || echo compliant- Expected output
compliant
How it is fixed
Fix method: Guidance or infrastructure patch
Based on the results of the audit script, establish unique UIDs and review all files owned by the shared UIDs to determine which UID they are supposed to belong to.
Properties
- Operating systems
- Any
- Tags
- container-optimized-oscos
- Reference
- CIS Google Container-Optimized OS Benchmark v1.2.0 - 6.2.16 Ensure no duplicate UIDs exist
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
shell
tmaegis scan --target cos