CVE Vulnerability

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

9.1 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://rubygems.org/gems/omniauth-auth0 Product Vendor Advisory
https://github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvm Third Party Advisory
https://github.com/auth0/omniauth-auth0/commit/fd3a14f4ccdfbc515d1121d6378ff88bf55a7a7a Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:auth0:omniauth-auth0:*:*:*:*:*:ruby:*:*
Information

Published : 2020-10-21 06:15

Updated : 2021-11-18 04:21

NVD link : CVE-2020-15240

Mitre link : CVE-2020-15240

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature