Vulnerability Details : CVE-2020-15240

omniauth-auth0 (rubygems) versions >= 2.3.0 and < 2.4.1 improperly validate the JWT token signature when using the `jwt_validator.verify` method. Improper validation of the JWT token signature can allow an attacker to bypass authentication and authorization. You are affected by this vulnerability if all of the following conditions apply: 1. You are using `omniauth-auth0`. 2. You are using `JWTValidator.verify` method directly OR you are not authenticating using the SDK’s default Authorization Code Flow. The issue is patched in version 2.4.1.
Published 2020-10-21 18:15:13
Updated 2021-11-18 16:21:41
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Products affected by CVE-2020-15240

Exploit prediction scoring system (EPSS) score for CVE-2020-15240

EPSS FAQ
0.30%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-15240

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
 MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N
8.6
4.9
 NIST
9.1
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.9
5.2
 NIST
7.4
 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
2.2
5.2
 GitHub, Inc.

CWE ids for CVE-2020-15240

  • When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
    Assigned by: security-advisories@github.com (Secondary)
  • The product does not verify, or incorrectly verifies, the cryptographic signature for data.
    Assigned by:
    • nvd@nist.gov (Primary)
    • security-advisories@github.com (Secondary)

References for CVE-2020-15240

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