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V-843

CAT II (Medium)

The ftpusers file must have mode 0640 or less permissive.

Rule ID

SV-45883r1_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-000225

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 ftpusers file.

Procedure:
For gssftp:
# ls -l /etc/ftpusers

For vsftp:
# ls -l /etc/vsftpd.ftpusers /etc/vsftpd/ftpusers
If the ftpusers file has a mode more permissive than 0640, this is a finding.

Fix Text

Change the mode of the ftpusers file to 0640.

Procedure:
For gssftp:
# chmod 0640 /etc/ftpusers

For vsftp:
# chmod 0640 /etc/vsftpd.ftpusers /etc/vsftpd/ftpusers