Multiple integer overflows in Dibbler 0.6.0 allow remote attackers to cause a denial of service (daemon crash) via packets containing options with large lengths which trigger attempts at excessive memory allocation as demonstrated by (1) the TSrvMsg constructor in SrvMessages/SrvMsg.cpp; the (2) TClntMsg (3) TClntOptIAAddress (4) TClntOptIAPrefix (5) TOptVendorSpecInfo and (6) TOptOptionRequest constructors; and the (7) TRelIfaceMgr::decodeRelayRepl (8) TRelMsg::decodeOpts and (9) TSrvIfaceMgr::decodeRelayForw methods.