The DataCollector service in EIQ Networks Network Security Analyzer allows remote attackers to cause a denial of service (service crash) via a (1) &CONNECTSERVER& (2) &ADDENTRY& (3) &FIN& (4) &START& (5) &LOGPATH& (6) &FWADELTA& (7) &FWALOG& (8) &SETSYNCHRONOUS& (9) &SETPRGFILE&, or (10) &SETREPLYPORT& string to TCP port 10618, which triggers a NULL pointer dereference.