Multiple unspecified vulnerabilities in ZNC 0.092 allow remote attackers to cause a denial of service (exception and daemon crash) via unknown vectors related to "unsafe substr() calls."
Client.cpp in ZNC 0.092 allows remote attackers to cause a denial of service (exception and daemon crash) via a PING command that lacks an argument.
NULL pointer dereference vulnerability in ZNC before 0.092 caused by traffic stats when there are unauthenticated connections.