When importing resources using Web Workers, error messages would distinguish the difference between <code>application/javascript</code> responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.
{ "binaries": [ { "binary_version": "97.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox" }, { "binary_version": "97.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox-dev" }, { "binary_version": "97.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "97.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox-mozsymbols" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "thunderbird" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "thunderbird-dev" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "thunderbird-gnome-support" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "thunderbird-mozsymbols" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "xul-ext-calendar-timezones" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "xul-ext-gdata-provider" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.18.04.1", "binary_name": "xul-ext-lightning" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "97.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox" }, { "binary_version": "97.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-dev" }, { "binary_version": "97.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "97.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-mozsymbols" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "thunderbird" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "thunderbird-dev" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "thunderbird-gnome-support" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "thunderbird-mozsymbols" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "xul-ext-calendar-timezones" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "xul-ext-gdata-provider" }, { "binary_version": "1:91.7.0+build2-0ubuntu0.20.04.1", "binary_name": "xul-ext-lightning" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "97.0+build2-0ubuntu1", "binary_name": "firefox" }, { "binary_version": "97.0+build2-0ubuntu1", "binary_name": "firefox-dev" }, { "binary_version": "97.0+build2-0ubuntu1", "binary_name": "firefox-geckodriver" }, { "binary_version": "97.0+build2-0ubuntu1", "binary_name": "firefox-mozsymbols" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "thunderbird" }, { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "thunderbird-dev" }, { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "thunderbird-gnome-support" }, { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "thunderbird-mozsymbols" }, { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "xul-ext-calendar-timezones" }, { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "xul-ext-gdata-provider" }, { "binary_version": "1:91.6.1+build1-0ubuntu1", "binary_name": "xul-ext-lightning" } ], "availability": "No subscription required" }