Security researcher Shinto K Anto reported an issue with cross-origin resource sharing (CORS) "preflight" requests when receiving certain Content-Type headers. This is due to an error in implementation resulting in trying to process multiple media types when they are returned in the Content-Type headers from a server. This is disallowed in the CORS specification and results in a simple instead of a "preflight" request, leading to potential same-origin policy violation. External Reference: https://www.mozilla.org/security/announce/2015/mfsa2015-127.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Shinto K Anto 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-2015:1982 https://rhn.redhat.com/errata/RHSA-2015-1982.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Via RHSA-2015:2519 https://rhn.redhat.com/errata/RHSA-2015-2519.html