VULNERABILITY INTELLIGENCE

CVE-2020-10143

CVSS score7.8 HIGH

EPSS probability0.64%

CISA KEVNot currently listed

Published2020-12-09

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

Macrium Reflect includes an OpenSSL component that specifies an OPENSSLDIR variable as C:\openssl\. Macrium Reflect contains a privileged service that uses this OpenSSL component. Because unprivileged Windows users can create subdirectories off of the system root, a user can create the appropriate path to a specially-crafted openssl.cnf file to achieve arbitrary code execution with SYSTEM privileges.

Weakness classification

CWE-284: Improper Access Control
CWE-665: Improper Initialization

Primary references

cret@cert.org — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource