| Name | CVE-2016-2403 |
| Description | Symfony before 2.8.6 and 3.x before 3.0.6 allows remote attackers to bypass authentication by logging in with an empty password and valid username, which triggers an unauthenticated bind. |
| 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-4262-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| symfony (PTS) | jessie, jessie (lts) | 2.3.21+dfsg-4+deb8u6 | fixed |
| stretch (security) | 2.8.7+dfsg-1.3+deb9u3 | fixed |
| stretch (lts), stretch | 2.8.7+dfsg-1.3+deb9u5 | fixed |
| buster (security), buster, buster (lts) | 3.4.22+dfsg-2+deb10u3 | fixed |
| bullseye | 4.4.19+dfsg-2+deb11u6 | fixed |
| bookworm | 5.4.23+dfsg-1+deb12u2 | fixed |
| bookworm (security) | 5.4.23+dfsg-1+deb12u4 | fixed |
| sid, trixie | 6.4.16+dfsg-1 | 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 | (not affected) | | | |
| symfony | source | stretch | 2.8.7+dfsg-1.3+deb9u1 | | DSA-4262-1 | |
| symfony | source | (unstable) | 2.8.6+dfsg-1 | | | |
Notes
[jessie] - symfony <not-affected> (Vulnerable code not present)
http://symfony.com/blog/cve-2016-2403-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password
Original commit incomplete and did not test for 'null' password resulting in
CVE-2018-11407. Complete fix as per
https://github.com/symfony/symfony/pull/26589
https://github.com/symfony/symfony/commit/2f5bd18d82f4a8911d549d14c72bf935602834a9