TMA-COS-6.2.19
Ensure no duplicate group names exist
MediumLevel 1Automatedcos
Description
Although the groupadd program will not let you create a duplicate group name, it is possible for an administrator to manually edit the /etc/group file and change the group name. If a group is assigned a duplicate group name, it will create and have access to files with the first GID for that group in /etc/group . Effectively, the GID is shared, which is a security problem.
How it is checked
Audit method: Shell command
shell
cut -d: -f1 /etc/group | 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 names for the user groups. File group ownerships will automatically reflect the change as long as the groups have unique GIDs.
Properties
- Operating systems
- Any
- Tags
- container-optimized-oscos
- Reference
- CIS Google Container-Optimized OS Benchmark v1.2.0 - 6.2.19 Ensure no duplicate group names exist
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
shell
tmaegis scan --target cos