| 제목 | casdoor commit 0585ecf Missing Authorization |
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| 설명 | Unauthenticated Arbitrary File Upload via /api/upload-resource
Summary
The POST /api/upload-resource endpoint in Casdoor accepts uploads from completely unauthenticated callers. The Casbin authorization policy whitelists this route for the anonymous principal (p, *, *, POST, /api/upload-resource, *, *), and the controller's helper that resolves the target storage provider (GetProviderFromContext) returns the provider directly when a ?provider= query parameter is supplied, bypassing the RequireSignedIn check that gates the fallback path. Any storage provider configured by an administrator (S3, Aliyun OSS, Local File System, Azure Blob, etc.) becomes a public write destination. The resulting Resource record is registered under the attacker-supplied owner / user / application query parameters, so the upload appears as if it were performed by an arbitrary legitimate user. When the storage provider serves uploaded files back (Local File System provider exposes /files/<path>), the attacker can retrieve the file with no authentication, creating a fully unauthenticated read-after-write primitive against the host.
https://github.com/casdoor/casdoor/ |
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| 원천 | ⚠️ https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resource |
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| 사용자 | geochen (UID 78995) |
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| 제출 | 2026. 07. 08. PM 03:52 (2 개월 ago) |
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| 모더레이션 | 2026. 09. 01. PM 07:55 (2 months later) |
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| 상태 | 수락 |
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| VulDB 항목 | 397791 [Casdoor 까지 4.0.0 upload-resource API controllers/resource.go 약한 인증] |
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| 포인트들 | 20 |
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