Vulnerability in Acronis True Image 2020
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Acronis True Image 2020 — versions 24.5.22510
Weakness classification (CWE)
References
- www.acronis.com (Vendor Advisory)
- danishcyberdefence.dk/blog (Third Party Advisory)
- madsjoensen.dk/cve-2020-9452/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-9452?
- CVE-2020-9452 is a high-severity vulnerability in Acronis True Image 2020, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2021-05-25.
- How severe is CVE-2020-9452?
- High severity. CVSS v3 base score is 7.8 out of 10.