client.cpp in BNBT EasyTracker 7.7r3.2004.10.27 and earlier allows remote attackers to cause a denial of service (application hang) via an HTTP header containing only a ":" (colon), possibly leading to an integer signedness error due to a missing field name or value.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22058
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-2807
http://www.securityfocus.com/bid/14700
http://secway.org/advisory/AD20050830.txt