CVE 2007-4904
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.
See the 
CVE page on Mitre.org
for more details.
