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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-4387r2_rule | ECCD-1 ECCD-2 | 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 |
|---|---|
| AIX 5.3 Security Technical Implementation Guide | 2012-05-25 |
Details
| Check Text ( C-8269r2_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-4298r2_fix) |
|---|
| Configure anonymous FTP accounts to use a non-functional shell. 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, /dev/null. |