RuggedCom Rugged Operating System (ROS) 3.10.x and earlier has a factory account with a password derived from the MAC Address field in the banner, which makes it easier for remote attackers to obtain access by performing a calculation on this address value, and then establishing a (1) TELNET, (2) remote shell (aka rsh), or (3) serial-console session.
archives.neohapsis.com/archives/bugtraq/2012-04/0186.html
arstechnica.com/business/news/2012/04/backdoor-in-mission-critical-hardware-threatens-power-traffic-control-systems.ars
ics-cert.us-cert.gov/advisories/ICSA-12-146-01A
seclists.org/fulldisclosure/2012/Apr/277
www.exploit-db.com/exploits/18779
www.kb.cert.org/vuls/id/889195
www.kb.cert.org/vuls/id/MAPG-8RCPEN
www.ruggedcom.com/productbulletin/ros-security-page/
www.securityfocus.com/bid/53215
www.us-cert.gov/control_systems/pdf/ICS-ALERT-12-116-01A.pdf
www.wired.com/threatlevel/2012/04/ruggedcom-backdoor/
exchange.xforce.ibmcloud.com/vulnerabilities/75120