High severity · published Dec 8, 2020
CVE-2020-9991
This issue was addressed with improved checks
7.5
CVSS
2.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.8% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.0 · source: NVD
IC
Icloud · Apple
before 7.21; 11.0 before 11.4 · source: NVD
MO
Mac OS X · Apple
before 11.0.1 · source: NVD
TV
Tvos · Apple
before 14.0 · source: NVD
WA
Watchos · Apple
before 7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9991
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9991
Mailing List
http://seclists.org/fulldisclosure/2020/Dec/32
lists.apache.org
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
Vendor Advisory
https://support.apple.com/en-us/HT211843
Vendor Advisory
https://support.apple.com/en-us/HT211844
Vendor Advisory
https://support.apple.com/en-us/HT211847
Vendor Advisory
https://support.apple.com/en-us/HT211850
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