DotVVM is an open source MVVM framework for web applications. Prior to 4.2.11, 4.3.15, and 5.0.0-preview09-final, applications with configured file upload storage allow unauthenticated users to submit files directly to DotvvmFileUploadMiddleware without an X-DotVVM-UploadToken generated by the FileUpload component. An attacker can repeatedly upload files and fill application storage, causing denial of service. DotvvmConfiguration.Security.AuthorizeFileUpload can additionally restrict which users may upload files.
This issue is fixed in versions 4.2.11, 4.3.15, and 5.0.0-preview09-final.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://github.com/riganti/dotvvm/commit/1635245b5eaf9ccf8e3536b9d8b19418195265…
security-advisories@github.com
https://github.com/riganti/dotvvm/commit/4fc26a8591c76fb92ed701352c2a84120cf926…
security-advisories@github.com
https://github.com/riganti/dotvvm/commit/6af982bbe3b00bdac00f1c0efe9365d52db642…
security-advisories@github.com
https://github.com/riganti/dotvvm/releases/tag/v4.3.15
security-advisories@github.com
https://github.com/riganti/dotvvm/releases/tag/v5.0.0-preview09
security-advisories@github.com
https://github.com/riganti/dotvvm/security/advisories/GHSA-2rm3-333w-xvc4
security-advisories@github.com