CVE Vulnerability

CVE-2020-9451

An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.

2.1 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

5.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

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-2020-9451/ 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 : 2021-06-03 02:05

NVD link : CVE-2020-9451

Mitre link : CVE-2020-9451

Products Affected
No products.
CWE
CWE-276

Incorrect Default Permissions