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All accounts must be assigned unique User Identification Numbers (UIDs).
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-762 | GEN000320 | SV-27068r1_rule | IAIA-1 IAIA-2 | Medium |
| Description |
|---|
| Accounts sharing a UID have full access to each others' files. This has the same effect as sharing a login. There is no way to assure identification, authentication, and accountability because the system sees them as the same user. If the duplicate UID is 0, this gives potential intruders another privileged account to attack. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 5 Security Technical Implementation Guide | 2017-03-01 |
Details
| Check Text ( C-36104r2_chk ) |
|---|
| Perform the following to ensure there are no duplicate UIDs: # cut -d: -f3 /etc/passwd | uniq -d If any duplicate UIDs are found, this is a finding. |
| Fix Text (F-31350r1_fix) |
|---|
| Edit user accounts to provide unique UIDs for each account. |