CVE-2024-49755

Description

Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core. IdentityServer's local API authentication handler performs insufficient validation of the cnf claim in DPoP access tokens. This allows an attacker to use leaked DPoP access tokens at local api endpoints even without possessing the private key for signing proof tokens. Note that this only impacts custom endpoints within an IdentityServer implementation that have explicitly used the LocalApiAuthenticationHandler for authentication. This vulnerability is patched in IdentityServer 7.0.8. Version 6.3 and below are unaffected, as they do not support DPoP in Local APIs.

Reserved 2024-10-18 | Published 2024-10-28 | Updated 2024-10-29 | Assigner GitHub_M

Problem types

CWE-287: Improper Authentication

Product status

>= 7.0.0, < 7.0.8
affected

References

github.com/...Server/security/advisories/GHSA-v9xq-2mvm-x8xc

github.com/...ommit/f28cac921c1f545afe65af71a9327224755b6dac

cve.org (CVE-2024-49755)

nvd.nist.gov (CVE-2024-49755)

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