The attemptAuthentication function in Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php in Symfony before 2.3.41, 2.7.x before 2.7.13, 2.8.x before 2.8.6, and 3.0.x before 3.0.6 does not limit the length of a username stored in a session, which allows remote attackers to cause a denial of service (session storage consumption) via a series of authentication attempts with long, non-existent usernames.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Symfony | Sensiolabs | * | 2.3.40 (including) |
| Symfony | Sensiolabs | 2.7.0 (including) | 2.7.0 (including) |
| Symfony | Sensiolabs | 2.7.1 (including) | 2.7.1 (including) |
| Symfony | Sensiolabs | 2.7.2 (including) | 2.7.2 (including) |
| Symfony | Sensiolabs | 2.7.3 (including) | 2.7.3 (including) |
| Symfony | Sensiolabs | 2.7.4 (including) | 2.7.4 (including) |
| Symfony | Sensiolabs | 2.7.5 (including) | 2.7.5 (including) |
| Symfony | Sensiolabs | 2.7.6 (including) | 2.7.6 (including) |
| Symfony | Sensiolabs | 2.7.7 (including) | 2.7.7 (including) |
| Symfony | Sensiolabs | 2.7.8 (including) | 2.7.8 (including) |
| Symfony | Sensiolabs | 2.7.9 (including) | 2.7.9 (including) |
| Symfony | Sensiolabs | 2.7.10 (including) | 2.7.10 (including) |
| Symfony | Sensiolabs | 2.7.11 (including) | 2.7.11 (including) |
| Symfony | Sensiolabs | 2.7.12 (including) | 2.7.12 (including) |
| Symfony | Sensiolabs | 2.8.0 (including) | 2.8.0 (including) |
| Symfony | Sensiolabs | 2.8.1 (including) | 2.8.1 (including) |
| Symfony | Sensiolabs | 2.8.2 (including) | 2.8.2 (including) |
| Symfony | Sensiolabs | 2.8.3 (including) | 2.8.3 (including) |
| Symfony | Sensiolabs | 2.8.4 (including) | 2.8.4 (including) |
| Symfony | Sensiolabs | 2.8.5 (including) | 2.8.5 (including) |
| Symfony | Sensiolabs | 3.0.0 (including) | 3.0.0 (including) |
| Symfony | Sensiolabs | 3.0.1 (including) | 3.0.1 (including) |
| Symfony | Sensiolabs | 3.0.2 (including) | 3.0.2 (including) |
| Symfony | Sensiolabs | 3.0.3 (including) | 3.0.3 (including) |
| Symfony | Sensiolabs | 3.0.4 (including) | 3.0.4 (including) |
| Symfony | Sensiolabs | 3.0.5 (including) | 3.0.5 (including) |
| Symfony | Ubuntu | artful | * |
| Symfony | Ubuntu | esm-apps/xenial | * |
| Symfony | Ubuntu | upstream | * |
| Symfony | Ubuntu | wily | * |
| Symfony | Ubuntu | xenial | * |
| Symfony | Ubuntu | yakkety | * |
| Symfony | Ubuntu | zesty | * |
References
- http://www.debian.org/security/2016/dsa-3588
- https://github.com/symfony/symfony/pull/18733
- https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session
- http://www.debian.org/security/2016/dsa-3588
- https://github.com/symfony/symfony/pull/18733
- https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session