Mozilla security developer Daniel Veditz discovered that <iframe sandbox> restrictions are not applied to an <object> element contained within a sandboxed iframe. This could allow content hosted within a sandboxed iframe to use <object> element to bypass the sandbox restrictions that should be applied. External Reference: http://www.mozilla.org/security/announce/2013/mfsa2013-107.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Daniel Veditz as the original reporter.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 5 Via RHSA-2013:1812 https://rhn.redhat.com/errata/RHSA-2013-1812.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 5 Via RHSA-2013:1823 https://rhn.redhat.com/errata/RHSA-2013-1823.html