Buffer overflow in the Internet Key Exchange version 1 (IKEv1) implementation in Symantec Dynamic VPN Services, as used in Enterprise Firewall, Gateway Security, and Firewall /VPN Appliance products, allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

The SMTP binding function in Symantec Firewall/VPN Appliance 200/200R firmware after 1.5Z and before 1.68, Gateway Security 360/360R and 460/460R firmware before vuild 858, and Nexland Pro800turbo, when configured for load balancing between two WANs, might send SMTP traffic to a trusted network through an untrusted network.

Symantec Enterprise Firewall/VPN Appliances 100, 200, and 200R running firmware before 1.63 allow remote attackers to cause a denial of service (device freeze) via a fast UDP port scan on the WAN interface.

Symantec Enterprise Firewall/VPN Appliances 100, 200, and 200R running firmware before 1.63 and Gateway Security 320, 360, and 360R running firmware before 622 uses a default read/write SNMP community string, which allows remote attackers to alter the firewall's configuration file.

Symantec Enterprise Firewall/VPN Appliances 100, 200, and 200R running firmware before 1.63 and Gateway Security 320, 360, and 360R running firmware before 622 allow remote attackers to bypass filtering and determine whether the device is running services such as tftpd, snmpd, or isakmp via a UDP port scan with a source port of UDP 53.

Symantec FireWall/VPN Appliance model 200 records a cleartext password for the password administration page, which may be cached on the administrator's local system or in a proxy, which allows attackers to steal the password and gain privileges.

Symantec Firewall/VPN Appliance 100 through 200R hardcodes the administrator's MAC address inside the firewall's configuration, which allows remote attackers to spoof the administrator's MAC address and perform an ARP poisoning man-in-the-middle attack to obtain the administrator's password.