Vulnerability in Microsoft Windows
CVE-2020-12423
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.
EPSS: 0.004 (34.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Windows
- Mozilla Firefox — versions unspecified
Weakness classification (CWE)
References
- security@mozilla.org (x_refsource_MISC, Vendor Advisory)
- security@mozilla.org (x_refsource_MISC, Issue Tracking, Vendor Advisory)
- security@mozilla.org (vendor-advisory, Broken Link, x_refsource_SUSE)
- security@mozilla.org (vendor-advisory, Broken Link, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2020-12423?
- CVE-2020-12423 is a high-severity vulnerability in Microsoft Windows, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2020-07-09.
- How severe is CVE-2020-12423?
- High severity. CVSS v3 base score is 7.8 out of 10.