CVE-2016-4423

NameCVE-2016-4423
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3588-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
symfony (PTS)jessie (security), jessie2.3.21+dfsg-4+deb8u3fixed
buster, sid, stretch2.8.7+dfsg-1.3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
symfonysource(unstable)2.8.6+dfsg-1medium
symfonysourcejessie2.3.21+dfsg-4+deb8u3mediumDSA-3588-1

Notes

https://github.com/symfony/symfony/pull/18733
https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session

Search for package or bug name: Reporting problems