Mozilla developer Boris Zbarsky reported that a malicious app could use the AlarmAPI to read the values of cross-origin references, such as an iframe's location object, as part of an alarm's JSON data. This allows a malicious app to bypass same-origin policy. Note: Users are only at risk for this issue if a web app has been installed. External Reference: http://www.mozilla.org/security/announce/2014/mfsa2014-82.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Boris Zbarsky as the original reporter.
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 5 Via RHSA-2014:1635 https://rhn.redhat.com/errata/RHSA-2014-1635.html