CVE-2020-9451

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.

• CWE-276

• https://danishcyberdefence.dk/blogThird Party Advisory
• https://madsjoensen.dk/cve-2020-9451/Exploit, Third Party Advisory
• https://www.acronis.comVendor Advisory
• https://danishcyberdefence.dk/blogThird Party Advisory
• https://madsjoensen.dk/cve-2020-9451/Exploit, Third Party Advisory
• https://www.acronis.comVendor Advisory

Published

May 25, 2021

Last Modified

Jun 17, 2026

Status

Modified

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