High severity8.8NVD Advisory· Published Jul 9, 2020· Updated Jun 17, 2026
CVE-2020-12420
CVE-2020-12420
Description
When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
55<68.10+ 2 more
- (no CPE)range: <68.10
- (no CPE)range: unspecified
- (no CPE)range: unspecified
<68.10.0+ 1 more
- (no CPE)range: <68.10.0
- (no CPE)range: unspecified
- osv-coords50 versionspkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/MozillaFirefox&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP2
< 128.5.1-1.1+ 49 more
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 78.0.1-lp151.2.53.1
- (no CPE)range: < 78.0.1-lp152.2.5.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 68.10.0-lp151.2.44.2
- (no CPE)range: < 68.10.0-lp152.2.4.1
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 78-21.12.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-4.14.1
- (no CPE)range: < 78-4.14.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78-35.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-3.94.2
- (no CPE)range: < 78.0.1-3.94.2
- (no CPE)range: < 78.0.1-78.80.2
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 78.0.1-112.3.1
- (no CPE)range: < 68.10.0-3.88.1
- (no CPE)range: < 68.10.0-3.88.1
Patches
Vulnerability mechanics
References
11- bugzilla.mozilla.org/show_bug.cginvdExploitIssue TrackingVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.htmlnvdMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.htmlnvdMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlnvdMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202007-09nvdThird Party Advisory
- security.gentoo.org/glsa/202007-10nvdThird Party Advisory
- usn.ubuntu.com/4421-1/nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2020-24/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2020-25/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2020-26/nvdVendor Advisory
News mentions
0No linked articles in our index yet.