CVE-2020-26286 - Vulnerability Details - OpenCVE

ReportizFlow

HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

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

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Hedgedoc	Hedgedoc

Configuration 1 [-]

cpe:2.3:a:hedgedoc:hedgedoc:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8
https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1
https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc

History

No history.

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2020-12-28T23:25:13

Updated: 2024-08-04T15:56:04.326Z

Reserved: 2020-10-01T00:00:00

Link: CVE-2020-26286

Vulnrichment

No data.

NVD

Status : Modified

Published: 2020-12-29T00:15:12.593

Modified: 2024-11-21T05:19:45.793

Link: CVE-2020-26286

Redhat

No data.

{"containers": {"cna": {"affected": [{"product": "hedgedoc", "vendor": "hedgedoc", "versions": [{"status": "affected", "version": "< 1.7.1"}]}], "descriptions": [{"lang": "en", "value": "HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-12-28T23:25:13", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8"}], "source": {"advisory": "GHSA-wcr3-xhv7-8gxc", "discovery": "UNKNOWN"}, "title": "Arbitary file upload", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "[email protected]", "ID": "CVE-2020-26286", "STATE": "PUBLIC", "TITLE": "Arbitary file upload"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "hedgedoc", "version": {"version_data": [{"version_value": "< 1.7.1"}]}}]}, "vendor_name": "hedgedoc"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}]}, "references": {"reference_data": [{"name": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc", "refsource": "CONFIRM", "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc"}, {"name": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1", "refsource": "MISC", "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1"}, {"name": "https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8", "refsource": "MISC", "url": "https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8"}]}, "source": {"advisory": "GHSA-wcr3-xhv7-8gxc", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T15:56:04.326Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2020-26286", "datePublished": "2020-12-28T23:25:13", "dateReserved": "2020-10-01T00:00:00", "dateUpdated": "2024-08-04T15:56:04.326Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:hedgedoc:hedgedoc:*:*:*:*:*:*:*:*", "matchCriteriaId": "DB55BE58-3D3F-40C5-89FE-2AACEA56F4E0", "versionEndExcluding": "1.7.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage."}, {"lang": "es", "value": "HedgeDoc es una plataforma colaborativa para escribir y compartir rebajas. En HedgeDoc versiones anteriores a 1.7.1, un atacante no autenticado puede cargar archivos arbitrarios al backend de almacenamiento de carga, incluyendo archivos HTML, JS y PHP. El problema est\u00e1 parcheado en HedgeDoc versi\u00f3n 1.7.1. Sin embargo, debe verificar que el almacenamiento de archivos cargados solo contenga archivos permitidos, ya que es posible que los archivos cargados a\u00fan puedan ser servidos. Como soluci\u00f3n alternativa, es posible bloquear el endpoint \"/uploadimage\" en su instancia usando su proxy inverso. Y/o restringir los tipos MIME y los nombres de archivo que se proporcionan desde el almacenamiento de archivos de carga"}], "id": "CVE-2020-26286", "lastModified": "2024-11-21T05:19:45.793", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "[email protected]", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}]}, "published": "2020-12-29T00:15:12.593", "references": [{"source": "[email protected]", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "[email protected]", "type": "Secondary"}]}