CVE-2021-30883 on CISA KEV

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

01What CISA says about this vulnerability

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..

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• support.apple.com — https://support.apple.com/en-us/HT212869
• support.apple.com — https://support.apple.com/en-us/HT212872
• support.apple.com — https://support.apple.com/en-us/HT212846
• support.apple.com — https://support.apple.com/en-us/HT212868
• support.apple.com — https://support.apple.com/en-us/HT212874
• support.apple.com — https://support.apple.com/en-us/HT212876

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
Apple	iOS and iPadOS	unspecified
Apple	iOS and iPadOS	unspecified
Apple	macOS	unspecified
Apple	macOS	unspecified
Apple	macOS	unspecified
Apple	macOS	unspecified

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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