Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 78.0 |
| Microsoft | Windows | - |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlBroken Link
- https://bugzilla.mozilla.org/show_bug.cgi?id=1642400Issue TrackingVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlBroken Link
- https://bugzilla.mozilla.org/show_bug.cgi?id=1642400Issue TrackingVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory
FAQ
What is CVE-2020-12423?
CVE-2020-12423 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 e...
How severe is CVE-2020-12423?
CVE-2020-12423 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12423?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Microsoft Windows.