Vulnerability DatabaseCVE-2018-11407
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CVE-2018-11407
Published:June 13, 2018
Updated:May 17, 2026
An 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.
Affected Packages
symfony/symfony (PHP):
Affected version(s) >=v4.0.0 <v4.0.7
Fix Suggestion:
Update to version v4.0.7
symfony/symfony (PHP):
Affected version(s) >=v3.4.0 <v3.4.7
Fix Suggestion:
Update to version v3.4.7
symfony/security-core (PHP):
Affected version(s) >=v4.0.0 <v4.0.7
Fix Suggestion:
Update to version v4.0.7
symfony/security (PHP):
Affected version(s) >=v4.0.0 <v4.0.7
Fix Suggestion:
Update to version v4.0.7
symfony/security-core (PHP):
Affected version(s) >=v3.0.0 <v3.3.17
Fix Suggestion:
Update to version v3.3.17
symfony/security (PHP):
Affected version(s) >=v3.4.0 <v3.4.7
Fix Suggestion:
Update to version v3.4.7
symfony/security-core (PHP):
Affected version(s) >=v2.8.0 <v2.8.37
Fix Suggestion:
Update to version v2.8.37
symfony/symfony (PHP):
Affected version(s) >=v2.8.0 <v2.8.37
Fix Suggestion:
Update to version v2.8.37
symfony/security-core (PHP):
Affected version(s) >=v3.4.0 <v3.4.7
Fix Suggestion:
Update to version v3.4.7
symfony/security (PHP):
Affected version(s) >=v2.8.0 <v2.8.37
Fix Suggestion:
Update to version v2.8.37
symfony/security (PHP):
Affected version(s) >=v3.0.0 <v3.3.17
Fix Suggestion:
Update to version v3.3.17
symfony/symfony (PHP):
Affected version(s) >=v3.0.0 <v3.3.17
Fix Suggestion:
Update to version v3.3.17
Related Resources (9)
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-core/CVE-2018-11407.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2018-11407.yaml
https://github.com/symfony/symfony/commit/b46fc93785d37ffa5d706a82cd175b33ce8f2934
https://github.com/symfony/symfony
https://symfony.com/blog/cve-2018-11407-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2018-11407.yaml
https://symfony.com/cve-2018-11407
https://nvd.nist.gov/vuln/detail/CVE-2018-11407
https://github.com/symfony/symfony/pull/27377
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Authentication
CWE-287
EPSS
Base Score:
0.14