An out-of-bounds read during the processing of glyph widths during text layout. This results in a potentially exploitable crash and could allow an attacker to read otherwise inaccessible memory. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Nov 8, 2019 | Jun 11, 2018 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Centos_linux | — | Upgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debuginfo | Apr 21, 2017 | Apr 20, 2017 |
| Debian | — | Upgrade firefox-esr | Apr 20, 2017 | Apr 20, 2017 |
| Freebsd | — | Upgrade libxulUpgrade thunderbirdUpgrade seamonkeyUpgrade linux-firefoxUpgrade firefox-esrUpgrade linux-thunderbirdUpgrade firefoxUpgrade linux-seamonkey | Apr 20, 2017 | Apr 19, 2017 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox. | Feb 20, 2018 | Feb 20, 2018 |
| Mfsa2017 10 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 53.0 | Jul 12, 2018 | Jun 11, 2018 |
| Mfsa2017 11 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 45.9 | Apr 20, 2017 | Apr 19, 2017 |
| Mfsa2017 12 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 52.1 | Apr 20, 2017 | Apr 19, 2017 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 52.1 | May 2, 2017 | Apr 30, 2017 |
| Oracle Solaris | — | Upgrade entire/ to version 11.4-11.4.0.0.1.15.0 on Solaris 11.4Upgrade web/browser/firefox/plugin/firefox-java to version 45.9.0-0.175.3.20.0.3.0 on Solaris 11.3Upgrade web/browser/firefox to version 45.9.0-0.175.3.20.0.3.0 on Solaris 11.3Upgrade web/data/firefox-bookmarks to version 45.9.0-0.175.3.20.0.3.0 on Solaris 11.3 | May 29, 2017 | May 29, 2017 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Apr 20, 2017 | Apr 19, 2017 |
| Redhat_linux | — | No solution existsUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird | Apr 20, 2017 | Apr 20, 2017 |
| Suse | — | Upgrade libsoftokn3-hmacUpgrade mozilla-nspr-32bitUpgrade mozilla-nsprUpgrade mozilla-nspr-x86Upgrade mozilla-nssUpgrade mozilla-nss-x86Upgrade libfreebl3-x86Upgrade MozillaThunderbird-buildsymbolsUpgrade mozilla-nss-develUpgrade MozillaFirefox-translationsUpgrade libsoftokn3-x86Upgrade mozilla-nss-32bitUpgrade MozillaThunderbird-debuginfoUpgrade mozilla-nss-sysinit-32bitUpgrade mozillafirefox-branding-sleUpgrade java-1_8_0-openjdk-headlessUpgrade mozilla-nss-certsUpgrade java-1_8_0-openjdk-develUpgrade libfreebl3Upgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbird-develUpgrade MozillaFirefox-debugsourceUpgrade libfreebl3-32bitUpgrade MozillaThunderbirdUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade libfreebl3-hmacUpgrade MozillaFirefox-translations-otherUpgrade libsoftokn3-hmac-32bitUpgrade libsoftokn3Upgrade mozilla-nss-toolsUpgrade MozillaFirefoxUpgrade mozilla-nss-sysinitUpgrade java-1_8_0-openjdkUpgrade libfreebl3-hmac-32bitUpgrade MozillaThunderbird-debugsourceUpgrade MozillaFirefox-develUpgrade mozilla-nspr-develUpgrade mozillafirefox-branding-upstreamUpgrade libsoftokn3-32bitUpgrade java-1_8_0-openjdk-demoUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-debuginfoUpgrade mozilla-nss-certs-32bit | Apr 24, 2017 | Apr 20, 2017 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Apr 21, 2017 | Apr 20, 2017 |
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