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CVE-2024-49755

3.1 · LOW

Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core.

Published Oct 28, 2024CWE-287EPSS 0.35%

Overview

CVE-2024-49755 is a low-severity vulnerability. It was published on October 28, 2024 and has a CVSS 3.1 base score of 3.1 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/DuendeSoftware/IdentityServer/commit/f28cac921c1f545afe65af71a9327224755b6dacGitHubgithub.com/DuendeSoftware/IdentityServer/security/advisories/GHSA-v9xq-2mvm-x8xc

How CyberStrike helps

Frequently asked questions

What is CVE-2024-49755?

CVE-2024-49755 is a low-severity vulnerability. It was published on October 28, 2024 and has a CVSS 3.1 base score of 3.1 (LOW).

How severe is CVE-2024-49755?

This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-49755?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-49755?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-49755 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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