When a page's content security policy (CSP) header contains a "sandbox" directive, other directives are ignored. This results in the incorrect enforcement of CSP. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.Referenceshttps://www.mozilla.org/security/advisories/mfsa2017-19/https://www.mozilla.org/security/advisories/mfsa2017-20/https://www.debian.org/security/2017/dsa-3968https://www.mozilla.org/security/advisories/mfsa2017-18/https://access.redhat.com/errata/RHSA-2017:2456http://www.securityfocus.com/bid/100234https://access.redhat.com/errata/RHSA-2017:2534https://bugzilla.mozilla.org/show_bug.cgi?id=1377426http://www.securitytracker.com/id/1039124https://security.gentoo.org/glsa/201803-14https://www.debian.org/security/2017/dsa-3928
