CVE-2023-42917 (GCVE-0-2023-42917)

Vulnerability from cvelistv5 – Published: 2023-11-30 22:18 – Updated: 2025-10-21 23:05
VLAI CISA KEV
Summary
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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • 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.
  • CWE-787 - Out-of-bounds Write
Assigner
References
Impacted products
Vendor Product Version
Apple Safari Affected: unspecified , < 17.1 (custom)
Create a notification for this product.
Apple macOS Affected: unspecified , < 14.1 (custom)
Create a notification for this product.
Apple iOS and iPadOS Affected: unspecified , < 17.1 (custom)
Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6dacc5fd-d355-413b-8617-2441eafc9aa8

Vulnerability ID: CVE-2023-42917

Status: Confirmed

Status Updated: 2023-12-04 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-12-04
Asserted: 2023-12-04
Scope
Notes: KEV entry: Apple Multiple Products WebKit Memory Corruption Vulnerability | Affected: Apple / Multiple Products | Description: Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing. | Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. | Due date: 2023-12-25 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): 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
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-787
Feed CISA Known Exploited Vulnerabilities Catalog
Product Multiple Products
Due Date 2023-12-25
Date Added 2023-12-04
Vendorproject Apple
Vulnerabilityname Apple Multiple Products WebKit Memory Corruption Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
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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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"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.\"}]}], \"providerMetadata\": {\"orgId\": \"286789f9-fbc2-4510-9f9a-43facdede74c\", \"shortName\": \"apple\", \"dateUpdated\": \"2024-06-12T09:05:54.874Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-42917\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:05:31.441Z\", \"dateReserved\": \"2023-09-14T19:05:11.463Z\", \"assignerOrgId\": \"286789f9-fbc2-4510-9f9a-43facdede74c\", \"datePublished\": \"2023-11-30T22:18:50.340Z\", \"assignerShortName\": \"apple\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.