CVE-2020-12423 Other in Firefox
Firefox on Windows may load a malicious DLL from the user's PATH if the system DLL is missing, allowing arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-12423?
CVE-2020-12423 is a high-severity vulnerability in Mozilla Firefox, published on 9 Jul 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-427
Which versions are affected by CVE-2020-12423?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2020-12423?
Upgrade to a fixed version.
Is CVE-2020-12423 being exploited?
There is no known exploitation of CVE-2020-12423 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-qj63-c77f-88gh.