CVE-2024-21643

Microsoft.IdentityModel.Protocols.SignedHttpRequest remote code execution vulnerability

CVSS 7.1 HIGHEPSS 2.2%CWE-94

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.1EPSS 2.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Jan 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected products

AzureAD · azure-activedirectory-identitymodel-extensions-for-dotnet

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References

https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/6.34.0 https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/7.1.2 https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/security/advisories/GHSA-rv9j-c866-gp5h https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/jkucve