Check: GEN004950
Title
The ftpusers file must not have an extended ACL. (Cat II impact)
Discussion
Excessive permissions on the ftpusers file could permit unauthorized modification. Unauthorized modification could result in Denial of Service to authorized FTP users or permit unauthorized users to access the FTP service.
Check Content
Check the permissions of the /etc/ftpusers file. # ls -D /etc/ftpusers If the file has an extended ACL, this is a finding.
Fix Text
Remove the extended ACL from the file. # chmod A- /etc/ftpusers
Additional Identifiers
Rule ID:
Vulnerability ID: V-22445
Group Title:
Expert Comments
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CCIs
CCIs tied to check.
| Number | Definition |
|---|---|
| CCI-000225 |
Employ the principle of least privilege, allowing only authorized accesses for users (or processes acting on behalf of users) which are necessary to accomplish assigned organizational tasks. |
Controls
Controls tied to check. These are derived from the CCIs shown above.
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |