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.
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Fri, 11 Oct 2024 21:15:00 +0000
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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
Vulnrichment
Updated: 2024-08-02T21:23:39.429Z
NVD
Status : Analyzed
Published: 2023-11-17T22:15:07.817
Modified: 2023-11-29T20:53:34.610
Link: CVE-2023-48238
Redhat
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