Respond faster and outpace attackers. Taking command of your attack surface starts here.
Respond faster and outpace attackers. Taking command of your attack surface starts here.
During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Dec 1, 2017 | Oct 25, 2017 |
| Amazon_linux | — | Upgrade nss | Oct 13, 2017 | Sep 28, 2017 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Centos_linux | — | Upgrade nss-toolsUpgrade nss-develUpgrade nssUpgrade nss-debuginfoUpgrade nss-pkcs11-develUpgrade nss-sysinit | Oct 2, 2017 | Sep 28, 2017 |
| Debian | — | Upgrade nssUpgrade firefox-esrUpgrade thunderbird | Sep 30, 2017 | Sep 28, 2017 |
| Freebsd | — | Upgrade nssUpgrade libxulUpgrade linux-thunderbirdUpgrade linux-c7-nssUpgrade linux-firefoxUpgrade thunderbirdUpgrade firefoxUpgrade linux-c6-nssUpgrade seamonkeyUpgrade firefox-esrUpgrade linux-seamonkey | Oct 12, 2017 | Oct 12, 2017 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox. | Feb 20, 2018 | Feb 20, 2018 |
| Huawei Euleros 2_0_sp1 | — | Upgrade nssUpgrade nss-sysinitUpgrade nss-toolsUpgrade nss-devel | Nov 30, 2017 | Sep 28, 2017 |
| Huawei Euleros 2_0_sp2 | — | Upgrade nss-develUpgrade nss-sysinitUpgrade nss-toolsUpgrade nss | Nov 30, 2017 | Sep 28, 2017 |
| Mfsa2017 21 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 56.0 | Jul 12, 2018 | Jun 11, 2018 |
| Mfsa2017 22 | — | Upgrade to Mozilla Firefox ESR version 52.4Upgrade to the latest version of Mozilla Firefox | Sep 29, 2017 | Sep 28, 2017 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 52.4Upgrade to the latest version of Mozilla Thunderbird | Oct 11, 2017 | Oct 9, 2017 |
| Oracle Solaris | — | Upgrade library/java/apache-commons-logging to version 1.0.4-11.4.7.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird to version 52.4.0-0.175.3.26.0.4.0 on Solaris 11.3Upgrade library/nspr/header-nspr to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3Upgrade library/security/nss to version 4.38-11.4.7.0.1.2.0 on Solaris 11.4Upgrade security/nss-utilities to version 4.36.1-11.4.7.0.1.2.0 on Solaris 11.4Upgrade library/java/commons-logging to version 1.0.4-11.4.7.0.1.2.0 on Solaris 11.4Upgrade SUNWaclg to version 1.0.4-11.4.7.0.1.2.0 on Solaris 11.4Upgrade library/java/jss to version 4.3.2-11.4.7.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 52.4.0-0.175.3.26.0.4.0 on Solaris 11.3Upgrade SUNWpr to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4Upgrade system/mozilla-nss to version 4.36.1-11.4.7.0.1.2.0 on Solaris 11.4Upgrade web/browser/firefox/plugin/firefox-java to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3Upgrade SUNWprd to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4Upgrade SUNWtlsu to version 4.36.1-11.4.7.0.1.2.0 on Solaris 11.4Upgrade web/browser/firefox to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3Upgrade SUNWtlsd to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4Upgrade SUNWjss to version 4.3.2-11.4.7.0.1.2.0 on Solaris 11.4Upgrade consolidation/sic_team/sic_team-incorporation to version 0.11.5-11.4.7.0.1.2.0 on Solaris 11.4Upgrade system/library/mozilla-nss/header-nss to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4Upgrade SUNWtls to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4Upgrade system/library/mozilla-nss to version 0.5.11-11.4.7.0.1.2.0 on Solaris 11.4 | Nov 30, 2017 | Nov 30, 2017 |
| Oracle_linux | — | Upgrade nss-develUpgrade nss-sysinitUpgrade nss-toolsUpgrade nssUpgrade nss-pkcs11-devel | Sep 29, 2017 | Sep 28, 2017 |
| Redhat_linux | — | Upgrade nss-pkcs11-develUpgrade nss-sysinitUpgrade nss-develUpgrade nss-toolsNo solution existsUpgrade nss-debuginfoUpgrade nss | Oct 4, 2017 | Sep 28, 2017 |
| Suse | — | Upgrade mozilla-nss-develUpgrade libfreebl3-32bitUpgrade MozillaFirefox-translationsUpgrade libfreebl3-hmac-32bitUpgrade mozilla-nss-certsUpgrade mozilla-nss-x86Upgrade mozilla-nss-certs-32bitUpgrade libsoftokn3Upgrade mozilla-nss-32bitUpgrade libfreebl3-x86Upgrade libsoftokn3-hmacUpgrade mozilla-nss-toolsUpgrade MozillaThunderbird-buildsymbolsUpgrade libsoftokn3-x86Upgrade MozillaThunderbird-develUpgrade MozillaFirefoxUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-develUpgrade mozilla-nssUpgrade mozilla-nss-sysinit-32bitUpgrade libsoftokn3-32bitUpgrade libfreebl3-hmacUpgrade MozillaFirefox-translations-commonUpgrade mozilla-nss-sysinitUpgrade MozillaThunderbirdUpgrade libfreebl3Upgrade libsoftokn3-hmac-32bit | Oct 2, 2017 | Sep 28, 2017 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefoxUpgrade libnss3 | Oct 2, 2017 | Sep 28, 2017 |
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