The PFE daemon in Juniper vSRX virtual firewalls with Junos OS before 15.1X49-D20 allows remote attackers to cause a denial of service via an unspecified connection request to the "host-OS."
http://www.securitytracker.com/id/1033856
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10703