Vulnerability Monitor

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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.

Published

2021-05-25T12:15:07.797

Last Modified

2024-11-21T05:40:40.050

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:N/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-276

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	acronis	true_image_2020	24.5.22510	Yes

References

https://danishcyberdefence.dk/blog Third Party Advisory ([email protected])
https://madsjoensen.dk/cve-2020-9451/ Exploit, Third Party Advisory ([email protected])
https://www.acronis.com Vendor Advisory ([email protected])
https://danishcyberdefence.dk/blog Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://madsjoensen.dk/cve-2020-9451/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.acronis.com Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)