CVE-2020-12423
First published: Tue Jun 30 2020(Updated: )
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.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <78 | 78 |
| Mozilla Thunderbird | <78 | 78 |
| Mozilla Firefox | <78.0 | |
| Microsoft Windows |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1642400
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-24/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-24/#CVE-2020-12416
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-29/
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
- https://www.mozilla.org/security/advisories/mfsa2020-24/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2020-12423?
CVE-2020-12423 is a vulnerability where 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%, which could lead to arbitrary code execution in Thunderbird.
Which operating systems are affected by CVE-2020-12423?
This vulnerability only affects the Windows operating system.
What is the severity of CVE-2020-12423?
CVE-2020-12423 has a severity level of medium.
How can I fix CVE-2020-12423?
To fix this vulnerability, update Mozilla Thunderbird to version 78 or later.
Where can I find more information about CVE-2020-12423?
You can find more information about CVE-2020-12423 on the Mozilla website.
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