CVE-2020-9451

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "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."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-05-25T11:01:41.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.acronis.com"}, {"tags": ["x_refsource_MISC"], "url": "https://danishcyberdefence.dk/blog"}, {"tags": ["x_refsource_MISC"], "url": "https://madsjoensen.dk/cve-2020-9451/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-9451", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://www.acronis.com", "refsource": "MISC", "url": "https://www.acronis.com"}, {"name": "https://danishcyberdefence.dk/blog", "refsource": "MISC", "url": "https://danishcyberdefence.dk/blog"}, {"name": "https://madsjoensen.dk/cve-2020-9451/", "refsource": "MISC", "url": "https://madsjoensen.dk/cve-2020-9451/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T10:26:16.116Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.acronis.com"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://danishcyberdefence.dk/blog"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://madsjoensen.dk/cve-2020-9451/"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2020-9451", "datePublished": "2021-05-25T11:01:41.000Z", "dateReserved": "2020-02-28T00:00:00.000Z", "dateUpdated": "2024-08-04T10:26:16.116Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:acronis:true_image_2020:24.5.22510:*:*:*:*:*:*:*", "matchCriteriaId": "5098DA80-2939-413C-AC35-A0D3A455CA28", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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"}], "id": "CVE-2020-9451", "lastModified": "2026-06-17T03:27:58.293", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-05-25T12:15:07.797", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://danishcyberdefence.dk/blog"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://madsjoensen.dk/cve-2020-9451/"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.acronis.com"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://danishcyberdefence.dk/blog"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://madsjoensen.dk/cve-2020-9451/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.acronis.com"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-276"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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