CVE-2020-9452 Privilege escalation in n/a
Unprivileged users can escalate to SYSTEM privileges via hardlink attacks on the anti-ransomware quarantine feature in Acronis True Image.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-9452?
CVE-2020-9452 is a high-severity vulnerability in n/a, published on 25 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-59
Which versions are affected by CVE-2020-9452?
It affects 1 product.
Products include Acronis True Image 2020.
How do I fix CVE-2020-9452?
No fix has been published for CVE-2020-9452 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-9452 being exploited?
There is no known exploitation of CVE-2020-9452 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-hgv8-rr8f-4q2r.