CVE-2020-9451

{"id": "CVE-2020-9451", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2021-05-25T12:15:07.797", "references": [{"url": "https://danishcyberdefence.dk/blog", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://madsjoensen.dk/cve-2020-9451/", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.acronis.com", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-276"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Acronis True Image 2020 versiones 24.5.22510. El archivo anti_ransomware_service.exe mantiene un registro en una carpeta donde usuarios no privilegiados tienen permisos de escritura. Los registros son generados en un patr\u00f3n predecible, permitiendo a un usuario no privilegiado crear un enlace f\u00edsico desde un archivo de registro (a\u00fan no dise\u00f1ado) hacia el archivo anti_ransomware_service.exe. Al reiniciar, esto obliga a anti_ransomware_service a intentar escribir su registro en su propio proceso, bloque\u00e1ndose en una SHARING VIOLATION. Este bloqueo ocurre en cada reinicio"}], "lastModified": "2021-06-03T14:05:10.747", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:acronis:true_image_2020:24.5.22510:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5098DA80-2939-413C-AC35-A0D3A455CA28"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}