Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 preserve the network connection used for favicon resource retrieval after the associated browser window is closed, which makes it easier for remote web servers to track users by observing network traffic from multiple IP addresses.
CVSS Details
- CVSS 3.1 Base Score: 4.3
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade firefox | Aug 6, 2016 | Aug 3, 2016 |
| Debian | — | Upgrade firefox-esr | Aug 6, 2016 | Aug 3, 2016 |
| Freebsd | — | Upgrade linux-firefoxUpgrade libxulUpgrade linux-thunderbirdUpgrade firefoxUpgrade linux-seamonkeyUpgrade seamonkeyUpgrade thunderbirdUpgrade firefox-esr | Dec 10, 2025 | Sep 7, 2016 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird. | Oct 30, 2017 | Aug 4, 2016 |
| Mfsa2016 63 | — | Upgrade to Mozilla Firefox ESR version 45.3Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 48.0 | Aug 3, 2016 | Aug 2, 2016 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks to version 45.4.0-0.175.3.14.0.4.0 on Solaris 11.3Upgrade developer/yasm to version 1.3.0-0.175.3.14.0.2.0 on Solaris 11.3Upgrade web/browser/firefox to version 45.4.0-0.175.3.14.0.4.0 on Solaris 11.3Upgrade mail/thunderbird to version 45.3.0-0.175.3.14.0.4.0 on Solaris 11.3Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 45.3.0-0.175.3.14.0.4.0 on Solaris 11.3 | May 29, 2017 | Aug 4, 2016 |
| Oracle_linux | — | Upgrade firefox | Aug 6, 2016 | Aug 2, 2016 |
| Redhat_linux | — | Upgrade firefox-debuginfoUpgrade firefox | Aug 3, 2016 | Aug 3, 2016 |
| Suse | — | Upgrade MozillaThunderbird-translations-otherUpgrade mozilla-nssUpgrade mozilla-nspr-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird-buildsymbolsUpgrade libfreebl3Upgrade MozillaThunderbirdUpgrade mozilla-nsprUpgrade MozillaThunderbird-develUpgrade MozillaFirefox-branding-SLEDUpgrade mozilla-nspr-32bitUpgrade MozillaFirefox-develUpgrade mozilla-nss-toolsUpgrade MozillaThunderbird-translations-commonUpgrade libfreebl3-32bitUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-otherUpgrade firefox-fontconfigUpgrade mozilla-nss-develUpgrade mozilla-nss-32bitUpgrade MozillaFirefox-translations | Aug 26, 2016 | Aug 4, 2016 |
| Ubuntu | — | Upgrade firefox | Aug 6, 2016 | Aug 4, 2016 |
Prioritize with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub