What is the CVSS score of CVE-2024-49755?

CVE-2024-49755 has a CVSS 3.1 base score of 3.1 (Low). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.3%.

Is there a patch available for CVE-2024-49755?

Yes, a patch is available for CVE-2024-49755. Update the affected software to the latest version immediately.

DPoP CVE-2024-49755

LOW

Improper Authentication (CWE-287)

2024-10-28 security-advisories@github.com

Authentication Bypass

3.1

CVSS 3.1 · Vendor: github

Severity by source

Vendor (github) PRIMARY

3.1 LOW

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

Primary rating from Vendor (github) · only source for this CVE.

CVSS VectorVendor: github

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Oct 28, 2024 - 20:15 cve.org

LOW 3.1

DescriptionCVE.org

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.

AnalysisAI

Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core. Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Improper Authentication (CWE-287), which allows attackers to bypass authentication mechanisms to gain unauthorized access. 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. Version information: Version 6.3.

Affected ProductsAI

DPoP access tokens. This.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement multi-factor authentication, enforce strong password policies, use proven authentication frameworks.