An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a null password and valid username, which triggers an unauthenticated bind. NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Symfony | Sensiolabs | 2.8.0 (including) | 2.8.37 (excluding) |
| Symfony | Sensiolabs | 3.3.0 (including) | 3.3.17 (excluding) |
| Symfony | Sensiolabs | 3.4.0 (including) | 3.4.7 (excluding) |
| Symfony | Sensiolabs | 4.0.0 (including) | 4.0.7 (excluding) |
| Symfony | Ubuntu | artful | * |
| Symfony | Ubuntu | bionic | * |
| Symfony | Ubuntu | esm-apps/bionic | * |
| Symfony | Ubuntu | upstream | * |