When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
{ "availability": "No subscription required", "binaries": [ { "binary_name": "firefox", "binary_version": "70.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-dev", "binary_version": "70.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-geckodriver", "binary_version": "70.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "70.0+build2-0ubuntu0.16.04.1" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "thunderbird", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" }, { "binary_name": "thunderbird-dev", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" }, { "binary_name": "thunderbird-gnome-support", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" }, { "binary_name": "thunderbird-mozsymbols", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" }, { "binary_name": "xul-ext-calendar-timezones", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" }, { "binary_name": "xul-ext-gdata-provider", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" }, { "binary_name": "xul-ext-lightning", "binary_version": "1:68.7.0+build1-0ubuntu0.16.04.2" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "firefox", "binary_version": "70.0+build2-0ubuntu0.18.04.1" }, { "binary_name": "firefox-dev", "binary_version": "70.0+build2-0ubuntu0.18.04.1" }, { "binary_name": "firefox-geckodriver", "binary_version": "70.0+build2-0ubuntu0.18.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "70.0+build2-0ubuntu0.18.04.1" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "thunderbird", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" }, { "binary_name": "thunderbird-dev", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" }, { "binary_name": "thunderbird-gnome-support", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" }, { "binary_name": "thunderbird-mozsymbols", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" }, { "binary_name": "xul-ext-calendar-timezones", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" }, { "binary_name": "xul-ext-gdata-provider", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" }, { "binary_name": "xul-ext-lightning", "binary_version": "1:68.2.1+build1-0ubuntu0.18.04.1" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "firefox", "binary_version": "70.0+build2-0ubuntu1" }, { "binary_name": "firefox-dev", "binary_version": "70.0+build2-0ubuntu1" }, { "binary_name": "firefox-geckodriver", "binary_version": "70.0+build2-0ubuntu1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "70.0+build2-0ubuntu1" } ] }