Quantum Secular Labs / Blog / Advisories

CVE-2025-24201: Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability

CVE-2025-24201 is rated critical with a CVSS v3.1 base score of 10.0 and affects Apple Multiple Products, along with 2 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available. CISA added it to its Known Exploited Vulnerabilities catalog on 2025-03-13, which means exploitation in the wild has been observed.

Vulnerability description

An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in Safari 18.3.1, iOS 15.8.4 and iPadOS 15.8.4, iOS 16.7.11 and iPadOS 16.7.11, iOS 18.3.2 and iPadOS 18.3.2, iPadOS 17.7.6, macOS Sequoia 15.3.2, visionOS 2.3.2, watchOS 11.4. Maliciously crafted web content may be able to break out of Web Content sandbox. This is a supplementary fix for an attack that was blocked in iOS 17.2. (Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 17.2.).

Severity breakdown

CVSS v3.1 10.0: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-787: Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Affected products

  • Apple Safari: before 18.3.1
  • Apple macOS: from 15.0 before 15.3.2
  • Apple Visionos: before 2.3.2
  • Apple Watchos: before 11.4
  • Apple Ipados: from 15.8 before 15.8.4; from 16.7 before 16.7.11; from 17.0 before 17.7.6; from 18.0 before 18.3.2
  • Apple Iphone OS: from 15.8 before 15.8.4; from 16.7 before 16.7.11; from 17.0 before 18.3.2
  • Debian Linux: 11.0

References