Jasig phpCAS version 1.3.4 is vulnerable to an authentication bypass in the validateCAS20 function when configured to authenticate against an old CAS server.
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 |
|---|---|---|---|
| Phpcas | Apereo | 1.3.4 (including) | 1.3.4 (including) |
| Php-cas | Ubuntu | artful | * |
| Php-cas | Ubuntu | bionic | * |
| Php-cas | Ubuntu | cosmic | * |
| Php-cas | Ubuntu | esm-apps/bionic | * |
| Php-cas | Ubuntu | esm-apps/xenial | * |
| Php-cas | Ubuntu | trusty | * |
| Php-cas | Ubuntu | upstream | * |
| Php-cas | Ubuntu | xenial | * |
| Php-cas | Ubuntu | yakkety | * |
| Php-cas | Ubuntu | zesty | * |