Multiple unspecified vulnerabilities in Ethereal 0.10.x up to 0.10.14 allow remote attackers to cause a denial of service (crash from null dereference) via (1) multiple vectors in H.248 and the (2) X.509if (3) SRVLOC (4) H.245 (5) AIM and (6) general packet dissectors; and (7) the statistics counter.