{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"cveId": "CVE-2022-41720", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "requesterUserId": "7d08541a-cd0a-42e2-8f81-76e6ceb65fc3", "dateReserved": "2022-09-28T17:00:06.609Z", "datePublished": "2022-12-07T16:11:18.867Z", "dateUpdated": "2023-06-12T19:05:39.487Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2023-06-12T19:05:39.487Z"}, "title": "Restricted file access on Windows in os and net/http", "descriptions": [{"lang": "en", "value": "On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS(\"C:/tmp\").Open(\"COM1\") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system. With fix applied, the behavior of os.DirFS(\"\") has changed. Previously, an empty root was treated equivalently to \"/\", so os.DirFS(\"\").Open(\"tmp\") would open the path \"/tmp\". This now returns an error."}], "affected": [{"vendor": "Go standard library", "product": "os", "collectionURL": "https://pkg.go.dev", "packageName": "os", "versions": [{"version": "0", "lessThan": "1.18.9", "status": "affected", "versionType": "semver"}, {"version": "1.19.0-0", "lessThan": "1.19.4", "status": "affected", "versionType": "semver"}], "platforms": ["windows"], "programRoutines": [{"name": "dirFS.Open"}, {"name": "dirFS.Stat"}, {"name": "DirFS"}], "defaultStatus": "unaffected"}, {"vendor": "Go standard library", "product": "net/http", "collectionURL": "https://pkg.go.dev", "packageName": "net/http", "versions": [{"version": "0", "lessThan": "1.18.9", "status": "affected", "versionType": "semver"}, {"version": "1.19.0-0", "lessThan": "1.19.4", "status": "affected", "versionType": "semver"}], "platforms": ["windows"], "programRoutines": [{"name": "Dir.Open"}, {"name": "ServeFile"}, {"name": "fileHandler.ServeHTTP"}, {"name": "fileTransport.RoundTrip"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE 22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}], "references": [{"url": "https://go.dev/issue/56694"}, {"url": "https://go.dev/cl/455716"}, {"url": "https://groups.google.com/g/golang-announce/c/L_3rmdT0BMU/m/yZDrXjIiBQAJ"}, {"url": "https://pkg.go.dev/vuln/GO-2022-1143"}]}}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "matchCriteriaId": "E0CD51B1-029E-442F-BE6A-772F4754D240", "versionEndExcluding": "1.18.9", "vulnerable": true}, {"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "matchCriteriaId": "B6AEBFD1-DEE2-40E0-B65C-8C7885014797", "versionEndExcluding": "1.19.4", "versionStartIncluding": "1.19.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "descriptions": [{"lang": "en", "value": "On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS(\"C:/tmp\").Open(\"COM1\") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system. With fix applied, the behavior of os.DirFS(\"\") has changed. Previously, an empty root was treated equivalently to \"/\", so os.DirFS(\"\").Open(\"tmp\") would open the path \"/tmp\". This now returns an error."}, {"lang": "es", "value": "En Windows, se puede acceder a archivos restringidos a trav\u00e9s de os.DirFS y http.Dir. La funci\u00f3n os.DirFS y el tipo http.Dir brindan acceso a un \u00e1rbol de archivos ubicados en un directorio determinado. Estas funciones permiten el acceso a archivos de dispositivos Windows bajo esa ra\u00edz. Por ejemplo, os.DirFS(\"C:/tmp\").Open(\"COM1\") abre el dispositivo COM1. Tanto os.DirFS como http.Dir solo brindan acceso al sistema de archivos de solo lectura. Adem\u00e1s, en Windows, un os.DirFS para el directorio (la ra\u00edz de la unidad actual) puede permitir que una ruta creada con fines malintencionados escape de la unidad y acceda a cualquier ruta del sistema. Con la correcci\u00f3n aplicada, el comportamiento de os.DirFS(\"\") ha cambiado. Anteriormente, una ra\u00edz vac\u00eda se trataba de manera equivalente a \"/\", por lo que os.DirFS(\"\").Open(\"tmp\") abrir\u00eda la ruta \"/tmp\". Esto ahora devuelve un error."}], "id": "CVE-2022-41720", "lastModified": "2022-12-12T14:58:01.733", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-12-07T17:15:10.293", "references": [{"source": "security@golang.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://go.dev/cl/455716"}, {"source": "security@golang.org", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://go.dev/issue/56694"}, {"source": "security@golang.org", "tags": ["Patch", "Release Notes", "Third Party Advisory"], "url": "https://groups.google.com/g/golang-announce/c/L_3rmdT0BMU/m/yZDrXjIiBQAJ"}, {"source": "security@golang.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://pkg.go.dev/vuln/GO-2022-1143"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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