CVE-2023-42917highunder attackCWE-787

CVE-2023-42917: high-severity vulnerability in Apple macOS

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51Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.8epss 9.3%
from disclosure to weapon
Published on NVDNov 30
CISA KEV+4d
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗
Affected
2 products (9 components)
Red Hat Enterprise Linux 7 · Red Hat Enterprise Linux 6
workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell…
Fixed
14 products (515 components)
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat Enterprise Linux AppStream (v. 9) · Red Hat Enterprise Linux AppStream E4S (v.8.6) · Red Hat Enterprise Linux AppStream E4S (v.9.0) · Red Hat Enterprise Linux AppStream EUS (v.8.8) · and others 9
fix ↗
Action required by CISAfederal deadline: 2023-12-25

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

In short

A memory corruption flaw in Apple's web processing could allow attackers to run malicious code on your device when you visit a harmful website. This has been fixed in recent updates to iOS, iPadOS, macOS, and Safari.

Technical detail

A heap buffer overflow (CWE-787) in web content processing allows remote code execution via crafted web pages. The vulnerability requires user interaction (visiting a malicious site) and affects iOS, iPadOS, macOS, and Safari. Fixed through improved synchronization primitives in versions iOS 17.1.2+, macOS Sonoma 14.1.2+, and Safari 17.1.2+.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Apple · iOS and iPadOSApple · macOSApple · Safari
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