CVE-2020-12423

HIGH

Firefox <78 - RCE

Title source: llm

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.

References (4)

[Broken Link] http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html

[Broken Link] http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html

[Issue Tracking, Vendor Advisory] https://bugzilla.mozilla.org/show_bug.cgi?id=1642400

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2020-24/

Scores

CVSS v3 7.8

EPSS 0.0028

EPSS Percentile 51.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Classification

CWE

CWE-427

Status published

Affected Products (1)

mozilla/firefox < 78.0

Timeline

Published Jul 09, 2020

Tracked Since Feb 18, 2026