Vulnerability · Published Dec 8, 2020 · Assigned by apple

CVE-2020-9991

High 7.5

In plain English

A high-severity security flaw in iCloud for Windows from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 87% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)2.8%top 13.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Apple	tvOS	unspecified – before 14.0
Apple	watchOS	unspecified – before 7.0
Apple	iCloud for Windows	unspecified – before 7.21
Apple	iOS and iPadOS	unspecified – before 14.0
Apple	macOS	unspecified – before 11.0
Apple	macOS	unspecified – before 11.0

References

https://support.apple.com/kb/HT211846 x_refsource_CONFIRM
https://support.apple.com/en-us/HT211843 x_refsource_MISC
https://support.apple.com/en-us/HT211850 x_refsource_MISC
https://support.apple.com/en-us/HT211844 x_refsource_MISC
https://support.apple.com/en-us/HT211931 x_refsource_MISC
https://support.apple.com/en-us/HT211847 x_refsource_MISC
20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1 mailing-list, x_refsource_FULLDISC
[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar mailing-list, x_refsource_MLIST