RealNetworks RealPlayer 10 Gold allows remote attackers to cause a denial of service (memory consumption) via a certain .ra file. NOTE: this issue was referred to as a "memory leak," but it is not clear if this is correct.
RealNetworks Helix Universal Server 9.0.2 for Linux and 9.0.3 for Windows allows remote attackers to cause a denial of service (CPU and memory exhaustion) via a POST request with a Content-Length header set to -1.
RealNetworks Helix Universal Server 9.0.1 and 9.0.2 allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference, as demonstrated using (1) GET_PARAMETER or (2) DESCRIBE requests.
Real Networks RealServer 7.x allows remote attackers to cause a denial of service via a malformed request for a page in the viewsource directory.
pnserver in RealServer 5.0 and earlier allows remote attackers to cause a denial of service by sending a short, malformed request.