The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | alpine-linux-upgrade-firefox-esr | Aug 22, 2024 | Apr 26, 2019 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-thunderbirdamazon-linux-ami-2-upgrade-thunderbird-debuginfo | Apr 27, 2020 | Apr 26, 2019 | |
| Arch Linux | arch-linux-upgrade-latest | Jul 11, 2025 | Apr 26, 2019 | |
| Centos_linux | — | centos-upgrade-firefoxcentos-upgrade-firefox-debuginfocentos-upgrade-firefox-debugsourcecentos-upgrade-thunderbirdcentos-upgrade-thunderbird-debuginfocentos-upgrade-thunderbird-debugsource | Apr 1, 2019 | Mar 19, 2019 |
| Debian | debian-upgrade-firefox-esrdebian-upgrade-thunderbird | Mar 21, 2019 | Mar 21, 2019 | |
| Freebsd | freebsd-upgrade-package-firefoxfreebsd-upgrade-package-waterfoxfreebsd-upgrade-package-seamonkeyfreebsd-upgrade-package-linux-seamonkeyfreebsd-upgrade-package-firefox-esrfreebsd-upgrade-package-linux-firefoxfreebsd-upgrade-package-libxulfreebsd-upgrade-package-thunderbirdfreebsd-upgrade-package-linux-thunderbird | Mar 20, 2019 | Mar 19, 2019 | |
| Gentoo Linux | gentoo-linux-upgrade-mail-client-thunderbirdgentoo-linux-upgrade-mail-client-thunderbird-bingentoo-linux-upgrade-www-client-firefoxgentoo-linux-upgrade-www-client-firefox-bin | Apr 3, 2019 | Apr 2, 2019 | |
| Huawei Euleros 2_0_sp2 | huawei-euleros-2_0_sp2-upgrade-firefox | May 1, 2019 | Apr 26, 2019 | |
| Huawei Euleros 2_0_sp3 | huawei-euleros-2_0_sp3-upgrade-firefox | May 30, 2019 | Apr 26, 2019 | |
| Mfsa2019 07 | mozilla-firefox-upgrade-66_0 | Mar 20, 2019 | Mar 19, 2019 | |
| Mfsa2019 08 | mozilla-firefox-esr-upgrade-60_6 | Mar 20, 2019 | Mar 19, 2019 | |
| Mozilla Thunderbird | mozilla-thunderbird-upgrade-60_6 | Mar 26, 2019 | Mar 19, 2019 | |
| Oracle Solaris | oracle-solaris-11-4-upgrade-library-libmozjs-60-60-8-0-11-4-33-0-1-94-0oracle-solaris-11-4-upgrade-mail-thunderbird-60-6-1-11-4-9-0-1-2-0oracle-solaris-11-4-upgrade-mail-thunderbird-plugin-thunderbird-lightning-60-6-1-11-4-9-0-1-2-0oracle-solaris-11-4-upgrade-web-browser-firefox-60-6-0-11-4-8-0-1-3-0oracle-solaris-11-4-upgrade-web-data-firefox-bookmarks-60-6-0-11-4-8-0-1-3-0 | Apr 17, 2019 | Apr 17, 2019 | |
| Oracle_linux | — | oracle-linux-upgrade-firefoxoracle-linux-upgrade-thunderbird | Apr 1, 2019 | Mar 20, 2019 |
| Redhat_linux | redhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource | Mar 21, 2019 | Mar 20, 2019 | |
| Suse | — | suse-upgrade-mozillafirefoxsuse-upgrade-mozillafirefox-branding-upstreamsuse-upgrade-mozillafirefox-buildsymbolssuse-upgrade-mozillafirefox-develsuse-upgrade-mozillafirefox-translations-commonsuse-upgrade-mozillafirefox-translations-othersuse-upgrade-mozillathunderbirdsuse-upgrade-mozillathunderbird-buildsymbolssuse-upgrade-mozillathunderbird-translations-commonsuse-upgrade-mozillathunderbird-translations-other | Apr 1, 2019 | Mar 19, 2019 |
| Ubuntu | ubuntu-upgrade-firefoxubuntu-upgrade-thunderbird | Apr 1, 2019 | Mar 19, 2019 |
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