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.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11364
https://helixcommunity.org/viewcvs/common/util/rlstate.cpp?view=log#rev1.10
https://bugzilla.redhat.com/show_bug.cgi?id=561860
http://www.redhat.com/support/errata/RHSA-2010-0094.html
http://secunia.com/advisories/38450
http://lists.helixcommunity.org/pipermail/common-cvs/2008-January/015484.html