CVE-2020-9452
Last modified
CVE-2020-9452 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.48% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Acronis | True Image 2020 | 24.5.22510 |
References
- https://danishcyberdefence.dk/blogThird Party Advisory
- https://madsjoensen.dk/cve-2020-9452/Exploit, Third Party Advisory
- https://www.acronis.comVendor Advisory
- https://danishcyberdefence.dk/blogThird Party Advisory
- https://madsjoensen.dk/cve-2020-9452/Exploit, Third Party Advisory
- https://www.acronis.comVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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