القائمة
Verify no duplicate Group IDs exist in /etc/group
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استنادا إلى تصنيف SOC المهني
| name | CIS Ubuntu 14.04 LTS - 6.2.17 Ensure no duplicate GIDs exist |
| description | Verify no duplicate Group IDs exist in /etc/group |
| category | cis-os-hardening |
| version | 2.1.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","ubuntu-14.04","level-1","scored","user-accounts"] |
| cis_id | 6.2.17 |
| cis_benchmark | CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | medium |
Although the groupadd program will not let you create a duplicate Group ID (GID), it is possible for an administrator to manually edit the /etc/group file and change the GID field.
User groups must be assigned unique GIDs for accountability and to ensure appropriate access protections.
Run the following script and verify no results are returned:
#!/bin/bash
cat /etc/group | cut -f3 -d":" | sort -n | uniq -c | while read x ; do
[ -z "${x}" ] && break
set - $x
if [ $1 -gt 1 ]; then
groups=`awk -F: '($3 == n) { print $1 }' n=$2 /etc/group | xargs`
echo "Duplicate GID ($2): ${groups}"
fi
done
No output should be returned.
Based on the results of the audit script, establish unique GIDs and review all files owned by the shared GID to determine which group they are supposed to belong to.
Not applicable.
You can also use the grpck command to check for other inconsistencies in the /etc/group file.
None
16 Account Monitoring and Control - Account Monitoring and Control