Zero-day vulnerability in macOS

Deserialization of Untrusted Data

Vulnerability details

Advisory: SB2021091319 - Multiple vulnerabilities in Apple macOS Big Sur

Vulnerable component: macOS

CVE-ID: CVE-2021-31010

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-502 - Deserialization of Untrusted Data


The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to insecure input validation when processing serialized data within the Core Telephony service. A local application can pass specially crafted data to the service and execute arbitrary code on the target system.

Note, the vulnerability is being actively exploited in the wild.