CVE-2023-42916 on CISA KEV

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been exploit

01What CISA says about this vulnerability

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

02Required action — verbatim from CISA

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

03Notes & references

• support.apple.com — https://support.apple.com/en-us/HT214033
• support.apple.com — https://support.apple.com/en-us/HT214032
• support.apple.com — https://support.apple.com/en-us/HT214031
• support.apple.com — https://support.apple.com/kb/HT214033
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/12/05/1
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• support.apple.com — https://support.apple.com/kb/HT214034
• www.debian.org — https://www.debian.org/security/2023/dsa-5575
• seclists.org — http://seclists.org/fulldisclosure/2023/Dec/3
• seclists.org — http://seclists.org/fulldisclosure/2023/Dec/4
• seclists.org — http://seclists.org/fulldisclosure/2023/Dec/5
• seclists.org — http://seclists.org/fulldisclosure/2023/Dec/8
• seclists.org — http://seclists.org/fulldisclosure/2023/Dec/13
• seclists.org — http://seclists.org/fulldisclosure/2023/Dec/12
• security.gentoo.org — https://security.gentoo.org/glsa/202401-04
• support.apple.com — https://support.apple.com/kb/HT214062
• seclists.org — http://seclists.org/fulldisclosure/2024/Jan/35

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	Safari	unspecified
Apple	macOS	unspecified
Apple	iOS and iPadOS	unspecified

06Detection

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

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