Multiple cross-site request forgery (CSRF) vulnerabilities on Motorola Surfboard with software SB5100-2.3.3.0-SCM00-NOSH allow remote attackers to (1) cause a denial of service (device reboot) via the "Restart Cable Modem" value in the BUTTON_INPUT parameter to configdata.html, and (2) cause a denial of service (hard reset) via the "Reset All Defaults" value in the BUTTON_INPUT parameter to configdata.html.