Buffer overflow in common/util/rlstate.cpp in Helix Player 1.0.6 and RealPlayer allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a RuleBook structure with a large number of rule-separator characters that trigger heap memory corruption.

Buffer overflow in the Unescape function in common/util/hxurl.cpp and player/hxclientkit/src/CHXClientSink.cpp in Helix Player 1.0.6 and RealPlayer allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a URL argument containing a % (percent) character that is not followed by two hex digits.

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.