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 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2018-09-18

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