CVE-2020-9451 Denial of service in n/a
An unprivileged user can cause a persistent denial of service in Acronis True Image by creating hardlinks to log files, crashing the anti-ransomware service on reboot.
- 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-2020-9451?
CVE-2020-9451 is a medium-severity denial of service 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 keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.
Weakness: CWE-276
Which versions are affected by CVE-2020-9451?
It affects 1 product.
Products include Acronis True Image 2020.
How do I fix CVE-2020-9451?
No fix has been published for CVE-2020-9451 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-9451 being exploited?
There is no known exploitation of CVE-2020-9451 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-wghq-w68q-jx98.