High severityNVD Advisory· Published Oct 21, 2020· Updated Aug 4, 2024
Regression in JWT Signature Validation
CVE-2020-15240
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
omniauth-auth0RubyGems | >= 2.3.0, < 2.4.1 | 2.4.1 |
Affected products
2- Range: >= 2.3.0, <2.4.1
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-58r4-h6v8-jcvmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-15240ghsaADVISORY
- github.com/auth0/omniauth-auth0/commit/fd3a14f4ccdfbc515d1121d6378ff88bf55a7a7aghsax_refsource_MISCWEB
- github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvmghsax_refsource_CONFIRMWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/omniauth-auth0/CVE-2020-15240.ymlghsaWEB
- rubygems.org/gems/omniauth-auth0ghsax_refsource_MISCWEB
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