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Anonymous FTP accounts must not have a functional shell.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-4387 | GEN005000 | SV-45886r1_rule | High |
| Description |
|---|
| If an anonymous FTP account has been configured to use a functional shell, attackers could gain access to the shell if the account is compromised. |
| STIG | Date |
|---|---|
| SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide | 2018-09-19 |
Details
| Check Text ( C-43203r1_chk ) |
|---|
| Check the shell for the anonymous FTP account. Procedure: # grep "^ftp" /etc/passwd This is a finding if the seventh field is empty (the entry ends with a ':') or if the seventh field does not contain one of the following: /bin/false /dev/null /usr/bin/false /bin/true /sbin/nologin |
| Fix Text (F-39264r2_fix) |
|---|
| Configure anonymous FTP accounts to use a non-functional shell. The Yast ‘Security and Users’ > ‘User and Group Management’ module can be used to configure the account. Or if necessary, edit the /etc/passwd file to remove any functioning shells associated with the ftp account and replace them with non-functioning shells, such as /bin/false. |