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If a malicious site repeatedly triggers a modal authentication prompt, eventually the browser UI will become non-responsive, requiring shutdown through the operating system. This is a denial of service (DOS) attack. This vulnerability affects Firefox < 52 and Thunderbird < 52.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Freebsd | — | Upgrade thunderbirdUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade seamonkeyUpgrade firefoxUpgrade linux-firefoxUpgrade libxulUpgrade linux-thunderbird | Mar 8, 2017 | Mar 7, 2017 |
| Mfsa2017 05 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 52.0 | Mar 8, 2017 | Mar 7, 2017 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 52.0Upgrade to the latest version of Mozilla Thunderbird | Apr 11, 2017 | Apr 5, 2017 |
| Oracle Solaris | — | Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 52.2.0-0.175.3.22.0.3.0 on Solaris 11.3Upgrade web/data/firefox-bookmarks to version 52.2.0-0.175.3.22.0.2.0 on Solaris 11.3Upgrade web/browser/firefox to version 52.2.0-0.175.3.22.0.2.0 on Solaris 11.3Upgrade web/browser/firefox/plugin/firefox-java to version 52.2.0-0.175.3.22.0.2.0 on Solaris 11.3Upgrade mail/thunderbird to version 52.2.0-0.175.3.22.0.3.0 on Solaris 11.3 | Jul 19, 2017 | Jul 19, 2017 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-develUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefoxUpgrade MozillaThunderbird-buildsymbolsUpgrade MozillaFirefox-translations-common | Mar 15, 2017 | Mar 7, 2017 |
| Ubuntu | — | Upgrade firefox | Mar 8, 2017 | Mar 7, 2017 |
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