CVE-2020-9991
HIGHCVSS 7.5/10EPSS 2.79%
Last modified
CVE-2020-9991 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. EPSS estimates a 2.79% chance of exploitation in the next 30 days.
Description
This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Icloud | < 7.21 |
| Apple | Icloud | >= 11.0, < 11.4 |
| Apple | Ipados | < 14.0 |
| Apple | Iphone Os | < 14.0 |
| Apple | Mac Os X | < 11.0.1 |
| Apple | Tvos | < 14.0 |
| Apple | Watchos | < 7.0 |
References
- http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT211843Vendor Advisory
- https://support.apple.com/en-us/HT211844Vendor Advisory
- https://support.apple.com/en-us/HT211847Vendor Advisory
- https://support.apple.com/en-us/HT211850Vendor Advisory
- https://support.apple.com/en-us/HT211931Vendor Advisory
- https://support.apple.com/kb/HT211846Vendor Advisory
- http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT211843Vendor Advisory
- https://support.apple.com/en-us/HT211844Vendor Advisory
- https://support.apple.com/en-us/HT211847Vendor Advisory
- https://support.apple.com/en-us/HT211850Vendor Advisory
- https://support.apple.com/en-us/HT211931Vendor Advisory
- https://support.apple.com/kb/HT211846Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-9991?
This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service.
How severe is CVE-2020-9991?
CVE-2020-9991 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.79% probability of exploitation in the next 30 days.
How do I fix CVE-2020-9991?
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-2020-9991?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST