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Database

Asymmetric denial of service In symfony/security

Description

Symphony Denial of Service Via Overlong Usernames 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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Package
Affected version
Patched versions

Aliases

1. CVE-2016-44232. NVD-2016-44233. OSV-2016-44234. OSV-DEBIAN-2016-44235. GCVE-2016-44236. SECURITY-TRACKER-CVE-2016-4423

References

1. https://github.com/symfony/symfony/pull/187332. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2016-4423.yaml3. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2016-4423.yaml4. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2016-4423.yaml5. https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session6. https://symfony.com/cve-2016-44237. http://www.debian.org/security/2016/dsa-3588

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