Vulnerability · Published Jul 9, 2020 · Assigned by mozilla
CVE-2020-12423
High 7.8
In plain English
A high-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.4%top 64.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.21 | firefox | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.22 | firefox | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.23 | firefox | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.21 | librewolf | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.22 | librewolf | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.23 | librewolf | 78.0-r0 | ALPINE-CVE-2020-12423 |
| Alpine:v3.24 | librewolf | 78.0-r0 | ALPINE-CVE-2020-12423 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2020-24/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1642400 x_refsource_MISC
- openSUSE-SU-2020:0983 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1017 vendor-advisory, x_refsource_SUSE