SARA / Free Tools / KEV / CVE-2021-1789

CVE-2021-1789 on CISA KEV

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web co

CISA KEV — Actively Exploited

Apple Multiple Products Type Confusion Vulnerability

Vendor / Product
— / Apple / Multiple Products
Added to KEV
2022-05-04
BOD 22-01 due
2022-05-25
Ransomware use
Unknown
CVSS / EPSS
— — · EPSS 24.00%

01What CISA says about this vulnerability

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

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)

VendorProductVersions
AppleiOS and iPadOSunspecified
ApplemacOSunspecified
ApplemacOSunspecified
ApplemacOSunspecified
ApplemacOSunspecified

06Detection

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

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