Off-by-one in macOS - CVE-2020-3840
Published: May 19, 2021
Vulnerability identifier: #VU53377
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-3840
CWE-ID: CWE-193
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an off-by-one error when processing racoon configuration files in IPSec implementation. A local user can trigger an off-by-one error with a specially crafted racoon file and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
macOS
How to mitigate CVE-2020-3840
Install updates from vendor's website.
macOS - update to 10.15.3 19D76