CVE-2024-49755

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.

CVSS v3 3.1 LOW

3.1^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.6 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/DuendeSoftware/IdentityServer/commit/f28cac921c1f545afe65af71a9327224755b6dac
https://github.com/DuendeSoftware/IdentityServer/security/advisories/GHSA-v9xq-2mvm-x8xc

Configurations

No configuration.

History

No history.

Information

Published : 2024-10-28 20:15

Updated : 2024-10-29 14:34

NVD link : CVE-2024-49755

Mitre link : CVE-2024-49755

CVE.ORG link : CVE-2024-49755

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

{"id": "CVE-2024-49755", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 1.6}]}, "published": "2024-10-28T20:15:06.297", "references": [{"url": "https://github.com/DuendeSoftware/IdentityServer/commit/f28cac921c1f545afe65af71a9327224755b6dac", "source": "security-advisories@github.com"}, {"url": "https://github.com/DuendeSoftware/IdentityServer/security/advisories/GHSA-v9xq-2mvm-x8xc", "source": "security-advisories@github.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Duende IdentityServer es un framework de trabajo de OpenID Connect y OAuth 2.x para ASP.NET Core. El controlador de autenticaci\u00f3n de API local de IdentityServer realiza una validaci\u00f3n insuficiente de la reclamaci\u00f3n cnf en tokens de acceso DPoP. Esto permite que un atacante utilice tokens de acceso DPoP filtrados en endpoints de API locales incluso sin poseer la clave privada para firmar tokens de prueba. Tenga en cuenta que esto solo afecta a los endpoints personalizados dentro de una implementaci\u00f3n de IdentityServer que hayan utilizado expl\u00edcitamente LocalApiAuthenticationHandler para la autenticaci\u00f3n. Esta vulnerabilidad est\u00e1 corregida en IdentityServer 7.0.8. La versi\u00f3n 6.3 y anteriores no se ven afectadas, ya que no admiten DPoP en API locales."}], "lastModified": "2024-10-29T14:34:50.257", "sourceIdentifier": "security-advisories@github.com"}