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All FTP users must have a default umask of 077.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-12011 | GEN005040 | SV-38813r1_rule | ECCD-1 ECCD-2 | Medium |
| Description |
|---|
| The umask controls the default access mode assigned to newly created files. An umask of 077 limits new files to mode 700 or less permissive. Although umask is stored as a 4-digit number, the first digit representing special access modes is typically ignored or required to be zero (0). |
| STIG | Date |
|---|---|
| AIX 5.3 Security Technical Implementation Guide | 2013-03-26 |
Details
| Check Text ( C-37053r1_chk ) |
|---|
| Check the umask setting for the "ftp" user. Procedure: # lsuser -a umask ftp If the umask value does not return 077 or 77, this is a finding. Check the default umask that the ftpd daemon is running with # grep ftpd /etc/inetd.conf If there is not a -u077 argument on the ftpd, this is a finding. |
| Fix Text (F-32321r1_fix) |
|---|
| Add the arguments -u077 to the ftpd on the /etc/inetd.conf and refresh inetd. #vi /etc/inetd.conf #refresh -s inetd Change the umask of the ftp user. #chuser umask=077 ftp |