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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.41% probability · 35th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-427
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
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 Tracking, Vendor 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 Tracking, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.