Permissions, Privileges, and Access Controls in macOS - CVE-2021-1771
Published: February 2, 2021
Vulnerability identifier: #VU50220
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1771
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists due to incorrect access restrictions within the Messages component in macOS. A remote user that is removed from an iMessage group could rejoin the group.
Affected software
macOS
How to mitigate CVE-2021-1771
Install updates from vendor's website.
macOS - addressed in versions 10.14.6 18G8012, 10.15.7 19H512, 11.2 20D64