CVE-2023-42917
Apple Multiple Products WebKit Memory Corruption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 25 December 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
A memory corruption vulnerability was addressed with improved locking. 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 lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 9.29% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 4 December 2023 · due 25 December 2023
- Weakness
- CWE-787
- Affected
- apple/safari · apple/ipados · apple/iphone os · apple/macos · debian/debian linux · fedoraproject/fedora · webkitgtk/webkitgtk\+
- Source
- product-security@apple.com
EPSS 9.3% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. https://support.apple.com/en-us/HT214031, https://support.apple.com/en-us/HT214032, https://support.apple.com/en-us/HT214033 ; https://nvd.nist.gov/vuln/detail/CVE-2023-42917
References
- http://seclists.org/fulldisclosure/2023/Dec/12Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/13Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/3Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/4Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/5Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/8Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2024/Jan/35Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/05/1Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/Mailing List
- https://security.gentoo.org/glsa/202401-04Third Party Advisory
- https://support.apple.com/en-us/HT214031Vendor Advisory
- https://support.apple.com/en-us/HT214032Vendor Advisory
- https://support.apple.com/en-us/HT214033Vendor Advisory
- https://support.apple.com/kb/HT214033Vendor Advisory
- https://support.apple.com/kb/HT214034Vendor Advisory
- https://support.apple.com/kb/HT214062Vendor Advisory
- https://www.debian.org/security/2023/dsa-5575Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/12Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/13Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/3Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/4Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/5Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Dec/8Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2024/Jan/35Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/05/1Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/Mailing List
- https://security.gentoo.org/glsa/202401-04Third Party Advisory
- https://support.apple.com/en-us/HT214031Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.