Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Acronis | True Image 2020 | 24.5.22510 |
Related Weaknesses (CWE)
References
- https://danishcyberdefence.dk/blogThird Party Advisory
- https://madsjoensen.dk/cve-2020-9452/ExploitThird Party Advisory
- https://www.acronis.comVendor Advisory
- https://danishcyberdefence.dk/blogThird Party Advisory
- https://madsjoensen.dk/cve-2020-9452/ExploitThird Party Advisory
- https://www.acronis.comVendor Advisory
FAQ
What is CVE-2020-9452?
CVE-2020-9452 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 anoth...
How severe is CVE-2020-9452?
CVE-2020-9452 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-9452?
Check the references section above for vendor advisories and patch information. Affected products include: Acronis True Image 2020.