RealNetworks RealPlayer 10.1.0.3114 and earlier, and Helix Player 1.0.6.778 on Fedora Core 6 (FC6) and possibly other platforms, allow user-assisted remote attackers to cause a denial of service (application crash) via a malformed .au file that triggers a divide-by-zero error.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36545
http://www.securityfocus.com/archive/1/479081/100/0/threaded
http://archives.neohapsis.com/archives/fulldisclosure/2007-09/0154.html