Zyxel Prestige 681 and 1600 (possibly other?) remote DoS

Hello, Zyxel Prestige 681 SDSL router is vulnerable to remote denial of service. By sending malformed packets, it is possible to bring down DSL link for few minutes. The problem persists only if packets come from DSL interface, not from Ethernet. ZyNOS reports that line is synchronizing and it...