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

CVE-2021-30883

High 7.8 Exploited

In plain English

A high-severity out-of-bounds write in iOS and iPadOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on May 23, 2022). The chance it is exploited in the next 30 days is estimated at 14.7% (higher than 97% of all known vulnerabilities). Apply updates per vendor instructions.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)14.7%top 3.3% of all CVEs

Exploited in the wildYesCISA KEV since May 23, 2022

Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Jun 13, 2022.

Official description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

Affected products (as reported)

Vendor	Product	Versions
Apple	iOS and iPadOS	unspecified – before 15.0
Apple	iOS and iPadOS	unspecified – before 14.8
Apple	macOS	unspecified – before 12.0
Apple	macOS	unspecified – before 11.6
Apple	macOS	unspecified – before 8.1
Apple	macOS	unspecified – before 15.1

Weakness: CWE-787 · 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/HT212869 x_refsource_MISC
https://support.apple.com/en-us/HT212872 x_refsource_MISC
https://support.apple.com/en-us/HT212846 x_refsource_MISC
https://support.apple.com/en-us/HT212868 x_refsource_MISC
https://support.apple.com/en-us/HT212874 x_refsource_MISC
https://support.apple.com/en-us/HT212876 x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30883 government-resource