CVE-2024-21643

Microsoft.IdentityModel.Protocols.SignedHttpRequest remote code execution vulnerability

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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.46%
Vendor Advisory github.com
Affected: AzureAD azure-activedirectory-identitymodel-extensions-for-dotnet
Published at:
Updated at:

References

Link Tags
https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/security/advisories/GHSA-rv9j-c866-gp5h vendor advisory
https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/6.34.0 release notes
https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/7.1.2 release notes
https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/jkucve mitigation third party advisory

Frequently Asked Questions

What is the severity of CVE-2024-21643?
CVE-2024-21643 has been scored as a high severity vulnerability.
How to fix CVE-2024-21643?
To fix CVE-2024-21643, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-21643 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-21643 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-21643?
CVE-2024-21643 affects AzureAD azure-activedirectory-identitymodel-extensions-for-dotnet.
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