CVE-2020-3866
MEDIUMCVSS 5.5/10EPSS 0.68%
Last modified
CVE-2020-3866 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. This was addressed with additional checks by Gatekeeper on files mounted through a network share. This issue is fixed in macOS Catalina 10.15.3. EPSS estimates a 0.68% chance of exploitation in the next 30 days.
Description
This was addressed with additional checks by Gatekeeper on files mounted through a network share. This issue is fixed in macOS Catalina 10.15.3. Searching for and opening a file from an attacker controlled NFS mount may bypass Gatekeeper.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | < 10.15.3 |
References
- https://support.apple.com/HT210919Release Notes, Vendor Advisory
- https://support.apple.com/HT210919Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-3866?
This was addressed with additional checks by Gatekeeper on files mounted through a network share. This issue is fixed in macOS Catalina 10.15.3. Searching for and opening a file from an attacker controlled NFS mount may bypass Gatekeeper.
How severe is CVE-2020-3866?
CVE-2020-3866 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3866?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-3866?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST