UNIX symbolic link following in macOS - CVE-2020-9855
Published: May 29, 2020
Vulnerability identifier: #VU28347
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-9855
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to escalate privileges on the system.
The vulnerability exists due to a symlink following issue within the Find My functionality. A local attacker can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.
Successful exploitation of this vulnerability may result in privilege escalation.
Affected software
macOS
How to mitigate CVE-2020-9855
Install updates from vendor's website.
macOS - update to 10.15.5 19F96