This script is Copyright (C) 2007-2013 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
A Libpng Security Advisory reports :
A grayscale PNG image with a malformed (bad CRC) tRNS chunk will crash
some libpng applications.
This vulnerability could be used to crash a browser when a user tries
to view such a malformed PNG file. It is not known whether the
vulnerability could be exploited otherwise.
See also :
Update the affected package.
Risk factor :
Medium / CVSS Base Score : 5.0