CVE Vulnerability

CVE-2020-9452

An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe includes functionality to quarantine files by copying a suspected ransomware file from one directory to another using SYSTEM privileges. Because unprivileged users have write permissions in the quarantine folder, it is possible to control this privileged write with a hardlink. This means that an unprivileged user can write/overwrite arbitrary files in arbitrary folders. Escalating privileges to SYSTEM is trivial with arbitrary writes. While the quarantine feature is not enabled by default, it can be forced to copy the file to the quarantine by communicating with anti_ransomware_service.exe through its REST API.

7.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://danishcyberdefence.dk/blog Third Party Advisory
https://www.acronis.com Vendor Advisory
https://madsjoensen.dk/cve-2020-9452/ Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:acronis:true_image_2020:24.5.22510:*:*:*:*:*:*:*
Information

Published : 2021-05-25 12:15

Updated : 2022-07-12 05:42

NVD link : CVE-2020-9452

Mitre link : CVE-2020-9452

Products Affected
No products.
CWE
CWE-59