Actively exploited · Published Aug 24, 2021 · Assigned by apple

CVE-2021-30869

High 7.8 Exploited

In plain English

A high-severity type confusion in iOS and iPadOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 4.2% (higher than 91% of all known vulnerabilities). Apply updates per vendor instructions.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)4.2%top 9.1% of all CVEs

Exploited in the wildYesCISA KEV since Nov 3, 2021

Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Nov 17, 2021.

Official description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

Affected products (as reported)

Vendor	Product	Versions
Apple	iOS and iPadOS	unspecified – before 14.4
Apple	macOS	unspecified – before 11.2
Apple	macOS	unspecified – before 12.5
Apple	macOS	unspecified – before 2021

Weakness: CWE-843 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://support.apple.com/en-us/HT212147 x_refsource_MISC
https://support.apple.com/en-us/HT212146 x_refsource_MISC
https://support.apple.com/en-us/HT212824 x_refsource_MISC
https://support.apple.com/en-us/HT212825 x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30869 government-resource