FreeBSD.Scalper.Worm

FreeBSD.Scalper.Worm is an Internet worm that targets Apache webservers running on FreeBSD 4.5. The worm exploits the Apache Chunked-Encoding Memory Corruption Vulnerability (Bugtraq ID 5033) in order to gain access to the system and installs a back door with DDoS capabilities.

** A possible new variant of ELF/Scalper has been reported in the wild. See Technical Description for more information.