CVE-2023-32439

Deeper analysis

A type confusion vulnerability, tracked as CVE-2023-32439 and assigned CWE-843, was present in WebKit components used by Apple platforms. The flaw affected iOS 16.5 and earlier, iPadOS 16.5 and earlier, iOS 15.7.6 and earlier, iPadOS 15.7.6 and earlier, macOS Ventura 13.4 and earlier, and Safari 16.5 and earlier. It was resolved through improved type checks in the updates iOS 16.5.1, iPadOS 16.5.1, iOS 15.7.7, iPadOS 15.7.7, macOS Ventura 13.4.1, and Safari 16.5.1.

An unauthenticated remote attacker could exploit the issue by serving maliciously crafted web content that a victim processes in a vulnerable browser or app. Successful exploitation grants arbitrary code execution with the privileges of the affected process, corresponding to the CVSS 8.8 rating that reflects network attack vector, low complexity, and no required privileges.

Apple security advisories HT213811, HT213813, HT213814, and HT213816 state that users should install the listed updates to address the vulnerability. The same advisories note that Apple is aware of reports indicating the issue may have been actively exploited in the wild. The associated EPSS score has remained flat at 0.0116 with no material increase observed after disclosure.