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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| symfony/security-http(Packagist) | 2.3.0 | 2.3.41 | N/A |
| symfony/security-http(Packagist) | 2.4.0 | 2.7.13 | N/A |
| symfony/security-http(Packagist) | 2.8.0 | 2.8.6 | N/A |
| symfony/security-http(Packagist) | 3.0.0 | 3.0.6 | N/A |
| symfony/security(Packagist) | 2.3.0 | 2.3.41 | N/A |
| symfony/security(Packagist) | 2.4.0 | 2.7.13 | N/A |
| symfony/security(Packagist) | 2.8.0 | 2.8.6 | N/A |
| symfony/security(Packagist) | 3.0.0 | 3.0.6 | N/A |
| symfony/symfony(Packagist) | 2.3.0 | 2.3.41 | N/A |
| symfony/symfony(Packagist) | 2.4.0 | 2.7.13 | N/A |
| symfony/symfony(Packagist) | 2.8.0 | 2.8.6 | N/A |
| symfony/symfony(Packagist) | 3.0.0 | 3.0.6 | N/A |
CVSS Metrics
