DotVVM is an open source MVVM framework for web applications. Prior to 4.2.11, 4.3.15, and 5.0.0-preview09-final, AuthorizeActionFilter performs no authorization because its explicit ICommandActionFilter.OnCommandExecutingAsync, IViewModelActionFilter.OnViewModelCreatedAsync, and IPresenterActionFilter.OnPresenterExecutingAsync implementations return completed tasks instead of invoking the corresponding checks. Applications relying on this filter can therefore expose protected commands, view models, or presenters to unauthorized requests without any special bypass technique. AuthorizeAttribute correctly implements the same interfaces and can be used as a workaround.
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
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
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/7578cf3459097cbbef0d3fea8a7774509b3241…
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-c8qj-jx8j-fg2w
security-advisories@github.com