Multiple stack-based buffer overflows in the use of FD_SET in TCPreen before 1.4.4 allow remote attackers to cause a denial of service via multiple concurrent connections, which result in overflows in the (1) SocketAddress::Connect function in libsolve/sockprot.cpp and (2) monitor_bridge function in src/bridge.cpp.
https://exchange.xforce.ibmcloud.com/vulnerabilities/39241
http://www.vupen.com/english/advisories/2007/4318
http://www.securityfocus.com/bid/27018
http://www.debian.org/security/2008/dsa-1443
http://secunia.com/advisories/28254