Unspecified vulnerability in Check Point Security Gateway R75 R76 R77 and R77.10 when UserCheck is enabled and the (1) Application Control (2) URL Filtering (3) DLP (4) Threat Emulation (5) Anti-Bot or (6) Anti-Virus blade is used allows remote attackers to cause a denial of service (fwk0 process crash core dump and restart) via a redirect to the UserCheck page.