Vulnerability in Apple Icloud
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.028 (86.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Apple Icloud
- Apple Icloud For Windows — versions unspecified
- Apple iOS And Ipados — versions unspecified
- Apple Ipados
- Apple Iphone OS
- Apple macOS — versions unspecified
- Apple Mac OS X
- Apple tvOS — versions unspecified
- Apple watchOS — versions unspecified
Public proof-of-concept exploits
References
- support.apple.com/kb/HT211846 (Vendor Advisory)
- support.apple.com/en-us/HT211843 (Vendor Advisory)
- support.apple.com/en-us/HT211850 (Vendor Advisory)
- support.apple.com/en-us/HT211844 (Vendor Advisory)
- support.apple.com/en-us/HT211931 (Vendor Advisory)
- support.apple.com/en-us/HT211847 (Vendor Advisory)
- seclists.org/fulldisclosure/2020/Dec/32 (mailing-list, Mailing List, Third Party Advisory)
- lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac… (mailing-list)
Frequently asked questions
- What is CVE-2020-9991?
- CVE-2020-9991 is a high-severity vulnerability in Apple Icloud. CVSS score: 7.5/10. Published 2020-12-08.
- How severe is CVE-2020-9991?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-9991 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.