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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3.0 : HIGH

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

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

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

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Configurations

Configuration 1 (hide)

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

Information

Published : 2021-05-25 05:15

Updated : 2022-07-12 10:42

NVD link : CVE-2020-9452

Mitre link : CVE-2020-9452

JSON object : View

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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Products Affected

acronis

true_image_2020

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