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Improper Verification of Cryptographic Signature Affecting json-jwt package, versions <1.15.3.1 >=1.16.0, <1.16.6

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.04% (9th percentile)

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  • Snyk ID SNYK-RUBY-JSONJWT-6139943
  • published 27 Dec 2023
  • disclosed 25 Dec 2023
  • credit P3ngu1nW
Report a new vulnerability Found a mistake?

Introduced: 25 Dec 2023

CVE-2023-51774 Open this link in a new tab
CWE-347 Open this link in a new tab

How to fix?

Upgrade json-jwt to version 1.15.3.1, 1.16.6 or higher.

Overview

json-jwt is a JSON Web Token and its family (JSON Web Signature, JSON Web Encryption and JSON Web Key) in Ruby.

Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature due to a sign/encryption confusion attack via the JSON::JWT.decode function . An attacker can bypass identity checks by exploiting the confusion between signature and encryption mechanisms in the token verification process.

Note: Exploiting this vulnerability is possible if the developer uses the RS-* of signing algorithms and an attacker has access to the public key.

References