CVE-2016-4423

Description

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.

References

https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session

https://github.com/symfony/symfony/pull/18733

http://www.debian.org/security/2016/dsa-3588

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3