Mozilla Network Security Services (NSS) before 3.19, as used in Mozilla Firefox before 39.0, Firefox ESR 31.x before 31.8 and 38.x before 38.1, Thunderbird before 38.1, and other products, does not properly determine state transitions for the TLS state machine, which allows man-in-the-middle attackers to defeat cryptographic protection mechanisms by blocking messages, as demonstrated by removing a forward-secrecy property by blocking a ServerKeyExchange message, aka a "SMACK SKIP-TLS" issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade nss | Aug 30, 2017 | Jul 5, 2015 |
| Centos_linux | — | Upgrade nss-pkcs11-develUpgrade nss-utilUpgrade nss-develUpgrade nssUpgrade nss-sysinitUpgrade nss-toolsUpgrade nss-util-devel | Dec 1, 2016 | Jul 5, 2015 |
| Debian | — | Upgrade nssUpgrade iceweaselUpgrade icedove | Jul 30, 2024 | Jul 6, 2015 |
| Freebsd | — | Upgrade firefoxUpgrade libxulUpgrade seamonkeyUpgrade linux-firefoxUpgrade thunderbirdUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade linux-thunderbird | Dec 10, 2025 | Jul 16, 2015 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade dev-libs/nspr.Upgrade www-client/firefox.Upgrade dev-libs/nss.Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird. | Oct 30, 2017 | Jul 5, 2015 |
| Mfsa2015 71 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 38.1Upgrade to Mozilla Firefox ESR version 31.8Upgrade to Mozilla Firefox version 39.0 | Jul 8, 2015 | Jul 5, 2015 |
| Mozilla Seamonkey | — | Upgrade to Mozilla SeaMonkey version 2.35Upgrade to the latest version of Mozilla SeaMonkey | Oct 22, 2015 | Jul 5, 2015 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 31.8Upgrade to Mozilla Thunderbird version 38.1 | Sep 14, 2015 | Jul 5, 2015 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 38.4.0-0.175.3.8.0.2.0 on Solaris 11.3Upgrade consolidation/desktop/desktop-incorporation to version 0.5.11-0.175.3.0.0.28.0 on Solaris 11.3Upgrade entire to version 0.5.11-0.175.3.0.0.30.0 on Solaris 11.3Upgrade database/sqlite-3 to version 3.9.2-0.175.3.8.0.2.0 on Solaris 11.3Upgrade runtime/tcl-8/tcl-sqlite-3 to version 3.9.2-0.175.3.8.0.2.0 on Solaris 11.3Upgrade database/sqlite-3/documentation to version 3.9.2-0.175.3.8.0.2.0 on Solaris 11.3 | May 29, 2017 | Jul 5, 2015 |
| Oracle_linux | — | Upgrade nss-develUpgrade nss-pkcs11-develUpgrade nss-toolsUpgrade nss | Oct 16, 2024 | Jul 6, 2015 |
| Suse | — | Upgrade mozilla-nspr-x86Upgrade MozillaFirefox-translations-otherUpgrade libfreebl3-debuginfo-x86Upgrade libsoftokn3-hmac-32bitUpgrade mozilla-nss-toolsUpgrade mozilla-nss-certs-debuginfo-32bitUpgrade mozilla-nss-certs-debuginfoUpgrade mozilla-nss-debuginfoUpgrade MozillaFirefoxUpgrade mozilla-nss-x86Upgrade mozilla-nss-debugsourceUpgrade firefox-gcc47Upgrade mozilla-nss-debuginfo-x86Upgrade libfreebl3-hmac-32bitUpgrade libsoftokn3-hmacUpgrade mozilla-nss-certs-debuginfo-x86Upgrade firefox-libstdc++6Upgrade mozilla-nss-sysinit-debuginfo-x86Upgrade libsoftokn3-32bitUpgrade MozillaThunderbird-develUpgrade mozilla-nss-certs-x86Upgrade libfreebl3-debuginfoUpgrade mozilla-nspr-develUpgrade libsoftokn3Upgrade MozillaThunderbird-debugsourceUpgrade MozillaThunderbird-translations-otherUpgrade mozilla-nss-sysinit-debuginfoUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nss-develUpgrade mozilla-nss-32bitUpgrade mozilla-nss-tools-debuginfoUpgrade libsoftokn3-debuginfo-x86Upgrade mozilla-nss-sysinit-x86Upgrade libfreebl3-32bitUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird-debuginfoUpgrade libfreebl3Upgrade mozilla-nss-certsUpgrade libfreebl3-hmacUpgrade mozilla-nss-sysinit-32bitUpgrade libfreebl3-x86Upgrade MozillaFirefox-debuginfoUpgrade libfreebl3-debuginfo-32bitUpgrade mozillafirefox-buildsymbolsUpgrade mozillafirefox-branding-upstreamUpgrade mozilla-nspr-32bitUpgrade mozilla-nss-sysinitUpgrade MozillaFirefox-develUpgrade libsoftokn3-x86Upgrade mozilla-nspr-debuginfoUpgrade mozilla-nss-debuginfo-32bitUpgrade MozillaThunderbird-buildsymbolsUpgrade mozilla-nspr-debuginfo-32bitUpgrade MozillaFirefox-translationsUpgrade libsoftokn3-debuginfo-32bitUpgrade MozillaThunderbirdUpgrade mozilla-nspr-debugsourceUpgrade mozilla-nspr-debuginfo-x86Upgrade mozilla-nss-sysinit-debuginfo-32bitUpgrade mozilla-nsprUpgrade MozillaFirefox-branding-SLEDUpgrade firefox-libgcc_s1Upgrade MozillaFirefox-debugsourceUpgrade libsoftokn3-debuginfoUpgrade mozilla-nssUpgrade mozilla-nss-certs-32bit | May 11, 2016 | Jul 5, 2015 |
| Ubuntu | — | Upgrade libnss3Upgrade firefoxUpgrade thunderbird | Nov 8, 2024 | Jul 6, 2015 |
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