Buffer overflow in RealSystem Server 6.x, 7.x and 8.x, and RealSystem Proxy 8.x, related to URL error handling, allows remote attackers to cause a denial of service and possibly execute arbitrary code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11362
http://www.kb.cert.org/vuls/id/912219
http://www.kb.cert.org/vuls/id/143627
http://service.real.com/help/faq/security/bufferoverflow.html