Cisco Secure PIX Firewall TCP Reset Vulnerability - The Cisco Secure PIX Firewall cannot distinguish between a forged TCP Reset (RST) packet and a genuine TCP RST packet because the sequence number is not checked. Any TCP/IP connection established through the Cisco Secure PIX Firewall can be terminated by a third party from the untrusted network if the connection can be uniquely determined. If only source ip / destination ip / destination port are known, a RST packet can be sent with each source port.
Cisco Secure PIX Firewall TCP Reset Vulnerability - The Cisco Secure PIX Firewall cannot distinguish between a forged TCP Reset (RST) packet and a genuine TCP RST packet because the sequence number is not checked. Any TCP/IP connection established through the Cisco Secure PIX Firewall can be terminated by a third party from the untrusted network if the connection can be uniquely determined. If only source ip / destination ip / destination port are known, a RST packet can be sent with each source port.