Multiple unknown vulnerabilities in the (1) WSP, (2) Q.931, (3) H.245, (4) KINK, (5) MGCP, (6) RPC, (7) SMBMailslot, and (8) SMB NETLOGON dissectors in Ethereal before 0.10.11 allow remote attackers to cause a denial of service (crash) via unknown vectors that lead to a null dereference.