Description
IdentityModel Extensions for .NET provide assemblies for web developers that wish to use federated identity providers for establishing the caller's identity. Anyone leveraging the `SignedHttpRequest`protocol or the `SignedHttpRequestValidator`is vulnerable. Microsoft.IdentityModel trusts the `jku`claim by default for the `SignedHttpRequest`protocol. This raises the possibility to make any remote or local `HTTP GET` request. The vulnerability has been fixed in Microsoft.IdentityModel.Protocols.SignedHttpRequest. Users should update all their Microsoft.IdentityModel versions to 7.1.2 (for 7x) or higher, 6.34.0 (for 6x) or higher.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low
Affected products
- AzureAD / azure-activedirectory-identitymodel-extensions-for-dotnet< 6.34.0 – < 6.34.0
- AzureAD / azure-activedirectory-identitymodel-extensions-for-dotnet>= 7.0.0-preview, < 7.1.2 – >= 7.0.0-preview, < 7.1.2
References
- VENDOR_ADVISORYhttps://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/security/advisories/GHSA-rv9j-c866-gp5h
- PATCHhttps://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/6.34.0
- PATCHhttps://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/7.1.2
- MISChttps://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/jkucve