Nortel UNIStim protocol, as used in Communication Server 1000 and other products, uses predictable sequence numbers, which allows remote attackers to hijack sessions via sniffing or brute force attacks.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Communication_server_1000 | Nortel | * | * |
| Unistim_protocol | Nortel | * | * |