CVE-2023-41990 on CISA KEV

The issue was addressed with improved handling of caches. This issue is fixed in tvOS 16.3, iOS 16.3 and iPadOS 16.3, macOS Monterey 12.6.8, macOS Big Sur 11.7.9, iOS 15.7.8 and iPadOS 15.7.8, macOS Ventura 13.2, watchOS 9.3. Processing a font file may lead to arbitrary code exec

01What CISA says about this vulnerability

The issue was addressed with improved handling of caches. This issue is fixed in tvOS 16.3, iOS 16.3 and iPadOS 16.3, macOS Monterey 12.6.8, macOS Big Sur 11.7.9, iOS 15.7.8 and iPadOS 15.7.8, macOS Ventura 13.2, watchOS 9.3. Processing a font file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released…

02Required action — verbatim from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

03Notes & references

• support.apple.com — https://support.apple.com/en-us/HT213606
• support.apple.com — https://support.apple.com/en-us/HT213601
• support.apple.com — https://support.apple.com/en-us/HT213842
• support.apple.com — https://support.apple.com/en-us/HT213845
• support.apple.com — https://support.apple.com/en-us/HT213605
• support.apple.com — https://support.apple.com/en-us/HT213844
• support.apple.com — https://support.apple.com/en-us/HT213599

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	tvOS	unspecified
Apple	iOS and iPadOS	unspecified
Apple	macOS	unspecified
Apple	macOS	unspecified
Apple	macOS	unspecified
Apple	watchOS	unspecified

06Detection

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

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