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CVE-2016-2403: Unauthorized access on a misconfigured LDAP server

February 7, 2017 (updated August 5, 2018)

There’s a flaw in LdapBindAuthenticationProvider that allows for an unauthorized access on a misconfigured LDAP server when using an empty password. Applications are affected only if they use the LDAP authentication provider.

References

  • symfony.com/blog/cve-2016-2403-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password
  • github.com/symfony/symfony/pull/18736

Code Behaviors & Features

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Affected versions

All versions starting from 2.8.0-alpha before 2.8.6, all versions starting from 3.0.0-alpha before 3.0.6

Fixed versions

  • v2.8.6
  • v3.0.6

Solution

Upgrade to versions v2.8.6, v3.0.6 or above.

Impact 9.8 CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-287: Improper Authentication

Source file

packagist/symfony/security-core/CVE-2016-2403.yml

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