Microsoft Security Advisory - A vulnerability in the trust relationships between Windows NT or Windows 2000 domains allow attackers to insert SID's of his choice into the authorization data at the trusted domain, he could elevate his privileges to those associated with any desired user or group, including the Domain Administrators group for the trusting domain. Microsoft FAQ on this issue available here.
Microsoft Security Advisory - A vulnerability in the trust relationships between Windows NT or Windows 2000 domains allow attackers to insert SID's of his choice into the authorization data at the trusted domain, he could elevate his privileges to those associated with any desired user or group, including the Domain Administrators group for the trusting domain. Microsoft FAQ on this issue available here.