High severity7.8NVD Advisory· Published Jul 9, 2020· Updated Jun 17, 2026
CVE-2020-12423
CVE-2020-12423
Description
When the Windows DLL "webauthn.dll" was missing from the Operating System, and a malicious one was placed in a folder in the user's %PATH%, Firefox may have loaded the DLL, leading to arbitrary code execution. *Note: This issue only affects the Windows operating system; other operating systems are unaffected.* This vulnerability affects Firefox < 78.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
47<78+ 1 more
- (no CPE)range: <78
- (no CPE)range: unspecified
- osv-coords45 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/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%209
< 128.5.1-1.1+ 44 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: < 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
Patches
Vulnerability mechanics
References
4- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingVendor Advisory
- www.mozilla.org/security/advisories/mfsa2020-24/nvdVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlnvdBroken Link
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlnvdBroken Link
News mentions
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