CVE-2018-11407

NameCVE-2018-11407
DescriptionAn issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a "null" password and valid username, which triggers an unauthenticated bind. NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.
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)
NVD severityhigh (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
stretch2.8.7+dfsg-1.3fixed
stretch (security)2.8.7+dfsg-1.3+deb9u1fixed
buster, sid3.4.15+dfsg-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
symfonysource(unstable)3.4.12+dfsg-1high
symfonysourcejessie(not affected)
symfonysourcestretch(not affected)

Notes

[stretch] - symfony <not-affected> (Incomplete fix for CVE-2016-2403 not applied)
[jessie] - symfony <not-affected> (Incomplete fix for CVE-2016-2403 not applied)
https://symfony.com/blog/cve-2018-11407-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password

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