Check Point Firewall-1 does not properly handle certain restricted keywords (e.g., Mail, auth, time) in user-defined objects, which could produce a rule with a default "ANY" address and result in access to more systems than intended by the administrator.
https://exchange.xforce.ibmcloud.com/vulnerabilities/7293
https://euvd.enisa.europa.eu/vulnerability/EUVD-1999-1185