An insufficient array boundary checking flaw was fixed in Real Player's / HelixPlayer's RuleBook structures handling code, leading to a heap corruption: http://lists.helixcommunity.org/pipermail/common-cvs/2008-January/015484.html https://helixcommunity.org/viewcvs/common/util/rlstate.cpp?view=log#rev1.10
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Via RHSA-2010:0094 https://rhn.redhat.com/errata/RHSA-2010-0094.html