joaquimserafim/json-web-token is a javascript library use to interact with JSON Web Tokens (JWT) which are a compact URL-safe means of representing claims to be transferred between two parties. Affected versions of the json-web-token library are vulnerable to a JWT algorithm confusion attack. On line 86 of the 'index.js' file, the algorithm to use for verifying the signature of the JWT token is taken from the JWT token, which at that point is still unverified and thus shouldn't be trusted. To exploit this vulnerability, an attacker needs to craft a malicious JWT token containing the HS256 algorithm, signed with the public RSA key of the victim application. This attack will only work against this library is the RS256 algorithm is in use, however it is a best practice to use that algorithm.
History

Fri, 11 Oct 2024 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-11-17T21:35:00.111Z

Updated: 2024-10-11T15:24:50.982Z

Reserved: 2023-11-13T13:25:18.482Z

Link: CVE-2023-48238

cve-icon Vulnrichment

Updated: 2024-08-02T21:23:39.429Z

cve-icon NVD

Status : Analyzed

Published: 2023-11-17T22:15:07.817

Modified: 2023-11-29T20:53:34.610

Link: CVE-2023-48238

cve-icon Redhat

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