| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-3588-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| symfony (PTS) | bullseye | 4.4.19+dfsg-2+deb11u6 | fixed |
| bookworm, bookworm (security) | 5.4.23+dfsg-1+deb12u4 | fixed | |
| sid, trixie | 6.4.20+dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| symfony | source | jessie | 2.3.21+dfsg-4+deb8u3 | DSA-3588-1 | ||
| symfony | source | (unstable) | 2.8.6+dfsg-1 |
https://github.com/symfony/symfony/pull/18733
https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session