CCE-95669-8| Platform: cpe:/o:debian:debian_linux:11.x, cpe:/o:ubuntu:ubuntu_linux:16.04, cpe:/o:ubuntu:ubuntu_linux:18.04, cpe:/o:ubuntu:ubuntu_linux:20.04, cpe:/o:ubuntu:ubuntu_linux:22.04, cpe:/o:ubuntu:ubuntu_linux:23.04 | Date: (C)2021-03-08 (M)2023-09-01 |
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.
Rationale:
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.
Fix:
Perform the appropriate action to correct any discrepancies found.
Parameter:
[yes/no]
Technical Mechanism:
Perform the appropriate action to correct any discrepancies found.
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 7.8 | Attack Vector: LOCAL |
| Exploit Score: 1.8 | Attack Complexity: LOW |
| Impact Score: 5.9 | Privileges Required: LOW |
| Severity: HIGH | User Interaction: NONE |
| Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Scope: UNCHANGED |
| | Confidentiality: HIGH |
| | Integrity: HIGH |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:92177 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:85246 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:70802 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:68722 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:70712 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:87389 |
