// For flags

CVE-2020-9451

 

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Se detectó un problema en Acronis True Image 2020 versiones 24.5.22510. El archivo anti_ransomware_service.exe mantiene un registro en una carpeta donde usuarios no privilegiados tienen permisos de escritura. Los registros son generados en un patrón predecible, permitiendo a un usuario no privilegiado crear un enlace físico desde un archivo de registro (aún no diseñado) hacia el archivo anti_ransomware_service.exe. Al reiniciar, esto obliga a anti_ransomware_service a intentar escribir su registro en su propio proceso, bloqueándose en una SHARING VIOLATION. Este bloqueo ocurre en cada reinicio

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-02-28 CVE Reserved
  • 2021-05-25 CVE Published
  • 2023-08-17 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-276: Incorrect Default Permissions
CAPEC
References (3)
URL Tag Source
https://danishcyberdefence.dk/blog Third Party Advisory
URL Date SRC
https://madsjoensen.dk/cve-2020-9451 2024-08-04
URL Date SRC
URL Date SRC
https://www.acronis.com 2021-06-03
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Acronis
Search vendor "Acronis"
 True Image 2020
Search vendor "Acronis" for product "True Image 2020"
 24.5.22510
Search vendor "Acronis" for product "True Image 2020" and version "24.5.22510"
-
Affected