The remote CentOS host is missing a security update.
An updated fetchmail package that fixes a security bug is now available for Red Hat Enterprise Linux 2.1, 3, 4 and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. Fetchmail is a remote mail retrieval and forwarding utility intended for use over on-demand TCP/IP links, like SLIP or PPP connections. A flaw was found in the way fetchmail processed certain APOP authentication requests. By sending certain responses when fetchmail attempted to authenticate against an APOP server, a remote attacker could potentially acquire certain portions of a user's authentication credentials. (CVE-2007-1558) All users of fetchmail should upgrade to this updated package, which contains a backported patch to correct this issue.