CVE-2020-15240
Regression in JWT Signature Validation
Impact
### Overview Versions after and including `2.3.0` are improperly validating the JWT token signature when using the `JWTValidator.verify` method. Improper validation of the JWT token signature when not using the default Authorization Code Flow can allow an attacker to bypass authentication and authorization. ### Am I affected? You are affected by this vulnerability if all of the following conditions apply: - You are using `omniauth-auth0`. - You are using `JWTValidator.verify` method directly OR you are not authenticating using the SDK’s default Authorization Code Flow. ### How to fix that? Upgrade to version `2.4.1`. ### Will this update impact my users? The fix provided in this version will not affect your users.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | omniauth-auth0 | >= 2.3.0, < 2.4.1 | 2.4.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Auth0 | Omniauth-Auth0 | from 2.3.0 before 2.4.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/auth0/omniauth-auth0/commit/fd3a14f4ccdfbc515d1121d6378ff88bf55a7a7a
- https://github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvm
- https://rubygems.org/gems/omniauth-auth0
- https://github.com/advisories/GHSA-58r4-h6v8-jcvm
- https://nvd.nist.gov/vuln/detail/CVE-2020-15240
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/omniauth-auth0/CVE-2020-15240.yml