CVE-2021-44052

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If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later"}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-59", "description": "CWE-59", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-05-05T16:50:21.000Z", "orgId": "2fd009eb-170a-4625-932b-17a53af1051f", "shortName": "qnap"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.qnap.com/en/security-advisory/qsa-22-16"}], "solutions": [{"lang": "en", "value": "We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS:\nQuTScloud c5.0.1.1998 and later\nQuTS hero h4.5.4.1971 build 20220310 and later\nQuTS hero h5.0.0.1986 build 20220324 and later\nQTS 4.3.4.1976 build 20220303 and later\nQTS 4.3.3.1945 build 20220303 and later\nQTS 4.2.6 build 20220304 and later\nQTS 4.3.6.1965 build 20220302 and later\nQTS 5.0.0.1986 build 20220324 and later\nQTS 4.5.4.1991 build 20220329 and later"}], "source": {"advisory": "QSA-22-16", "discovery": "EXTERNAL"}, "title": "Arbitrary file read", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@qnap.com", "DATE_PUBLIC": "2022-05-06T00:00:00.000Z", "ID": "CVE-2021-44052", "STATE": "PUBLIC", "TITLE": "Arbitrary file read"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "QuTScloud", "version": {"version_data": [{"version_affected": "<", "version_value": "c5.0.1.1998"}]}}, {"product_name": "QuTS hero", "version": {"version_data": [{"version_affected": "<", "version_value": "h4.5.4.1971 build 20220310"}, {"version_affected": "<", "version_value": "h5.0.0.1986 build 20220324"}]}}, {"product_name": "QTS", "version": {"version_data": [{"version_affected": "<", "version_value": "4.3.4.1976 build 20220303"}, {"version_affected": "<", "version_value": "4.3.3.1945 build 20220303"}, {"version_affected": "<", "version_value": "4.2.6 build 20220304"}, {"version_affected": "<", "version_value": "4.3.6.1965 build 20220302"}, {"version_affected": "<", "version_value": "5.0.0.1986 build 20220324"}, {"version_affected": "<", "version_value": "4.5.4.1991 build 20220329"}]}}]}, "vendor_name": "QNAP Systems Inc."}]}}, "credit": [{"lang": "eng", "value": "Enio Pena Navarro and Michael Messner from Siemens Energy AG"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An improper link resolution before file access ('Link Following') vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero, and QTS. If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later"}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-59"}]}]}, "references": {"reference_data": [{"name": "https://www.qnap.com/en/security-advisory/qsa-22-16", "refsource": "MISC", "url": "https://www.qnap.com/en/security-advisory/qsa-22-16"}]}, "solution": [{"lang": "en", "value": "We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS:\nQuTScloud c5.0.1.1998 and later\nQuTS hero h4.5.4.1971 build 20220310 and later\nQuTS hero h5.0.0.1986 build 20220324 and later\nQTS 4.3.4.1976 build 20220303 and later\nQTS 4.3.3.1945 build 20220303 and later\nQTS 4.2.6 build 20220304 and later\nQTS 4.3.6.1965 build 20220302 and later\nQTS 5.0.0.1986 build 20220324 and later\nQTS 4.5.4.1991 build 20220329 and later"}], "source": {"advisory": "QSA-22-16", "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:10:17.352Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.qnap.com/en/security-advisory/qsa-22-16"}]}]}, "cveMetadata": {"assignerOrgId": "2fd009eb-170a-4625-932b-17a53af1051f", "assignerShortName": "qnap", "cveId": "CVE-2021-44052", "datePublished": "2022-05-05T16:50:22.030Z", "dateReserved": "2021-11-19T00:00:00.000Z", "dateUpdated": "2024-09-16T22:56:12.420Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later"}, {"lang": "es", "value": "Se ha informado de una vulnerabilidad de resoluci\u00f3n de enlaces inapropiada antes del acceso a los archivos (\"Link Following\") que afecta a los dispositivos QNAP que ejecutan QuTScloud, QuTS hero y QTS. Si es explotada, esta vulnerabilidad permite a atacantes remotos saltar el sistema de archivos hasta ubicaciones no deseadas y leer o sobrescribir el contenido de archivos no esperados. Ya hemos corregido esta vulnerabilidad en las siguientes versiones de QuTScloud, QuTS hero y QTS: QuTScloud c5.0.1.1998 y posteriores QuTS hero h4.5.4.1971 build 20220310 y posteriores QuTS hero h5.0.0.1986 build 20220324 y posteriores QTS 4.3.4.1976 build 20220303 y posteriores QTS 4.3.3. 1945 build 20220303 y posteriores QTS 4.2.6 build 20220304 y posteriores QTS 4.3.6.1965 build 20220302 y posteriores QTS 5.0.0.1986 build 20220324 y posteriores QTS 4.5.4.1991 build 20220329 y posteriores"}], "id": "CVE-2021-44052", "lastModified": "2026-06-17T04:11:51.537", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 5.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security@qnapsecurity.com.tw", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-05-05T17:15:10.220", "references": [{"source": "security@qnapsecurity.com.tw", "tags": ["Vendor Advisory"], "url": "https://www.qnap.com/en/security-advisory/qsa-22-16"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.qnap.com/en/security-advisory/qsa-22-16"}], "sourceIdentifier": "security@qnapsecurity.com.tw", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "security@qnapsecurity.com.tw", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-59"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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