A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when "data:" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57.
{ "binaries": [ { "binary_name": "firefox", "binary_version": "57.0+build4-0ubuntu0.14.04.4" }, { "binary_name": "firefox-dev", "binary_version": "57.0+build4-0ubuntu0.14.04.4" }, { "binary_name": "firefox-globalmenu", "binary_version": "57.0+build4-0ubuntu0.14.04.4" }, { "binary_name": "firefox-mozsymbols", "binary_version": "57.0+build4-0ubuntu0.14.04.4" }, { "binary_name": "firefox-testsuite", "binary_version": "57.0+build4-0ubuntu0.14.04.4" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_name": "firefox", "binary_version": "57.0+build4-0ubuntu0.16.04.5" }, { "binary_name": "firefox-dev", "binary_version": "57.0+build4-0ubuntu0.16.04.5" }, { "binary_name": "firefox-globalmenu", "binary_version": "57.0+build4-0ubuntu0.16.04.5" }, { "binary_name": "firefox-mozsymbols", "binary_version": "57.0+build4-0ubuntu0.16.04.5" }, { "binary_name": "firefox-testsuite", "binary_version": "57.0+build4-0ubuntu0.16.04.5" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_name": "firefox", "binary_version": "57.0.1+build2-0ubuntu1" }, { "binary_name": "firefox-dev", "binary_version": "57.0.1+build2-0ubuntu1" }, { "binary_name": "firefox-globalmenu", "binary_version": "57.0.1+build2-0ubuntu1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "57.0.1+build2-0ubuntu1" }, { "binary_name": "firefox-testsuite", "binary_version": "57.0.1+build2-0ubuntu1" } ], "availability": "No subscription required" }