This script is Copyright (C) 2006-2016 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
Ubuntu reports :
A buffer overflow was found in the 'pnmtopng' conversion program. By
tricking an user (or automated system) to process a specially crafted
PNM image with pnmtopng, this could be exploited to execute arbitrary
code with the privileges of the user running pnmtopng.
See also :
Update the affected package.
Risk factor :
High / CVSS Base Score : 7.5
CVSS Temporal Score : 6.5
Public Exploit Available : false