CVE-2016-2403

NameCVE-2016-2403
DescriptionSymfony 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4262-1
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
symfony (PTS)jessie2.3.21+dfsg-4+deb8u3fixed
jessie (security)2.3.21+dfsg-4+deb8u6fixed
stretch2.8.7+dfsg-1.3+deb9u2fixed
stretch (security)2.8.7+dfsg-1.3+deb9u3fixed
buster3.4.22+dfsg-2fixed
buster (security)3.4.22+dfsg-2+deb10u1fixed
bullseye, sid4.3.8+dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
symfonysource(unstable)2.8.6+dfsg-1
symfonysourcejessie(not affected)
symfonysourcestretch2.8.7+dfsg-1.3+deb9u1DSA-4262-1

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

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