CVE-2016-2403

Debian Security Advisory 4262-1

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Symfony en versiones anteriores a 2.8.6 y 3.x en versiones anteriores a 3.0.6 permite a atacantes remotos eludir la autenticación mediante el inicio de sesión con un nombre de usuario válido y una contraseña vacía, lo que desencadena una unión no autenticada.

Multiple vulnerabilities have been found in the Symfony PHP framework which could lead to open redirects, cross-site request forgery, information disclosure, session fixation or denial of service.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-02-18 CVE Reserved
2017-02-07 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/96137	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://symfony.com/blog/cve-2016-2403-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password	2018-08-06
https://www.debian.org/security/2018/dsa-4262	2018-08-06

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				2.8.0 Search vendor "Sensiolabs" for product "Symfony" and version "2.8.0"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				2.8.1 Search vendor "Sensiolabs" for product "Symfony" and version "2.8.1"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				2.8.2 Search vendor "Sensiolabs" for product "Symfony" and version "2.8.2"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				2.8.3 Search vendor "Sensiolabs" for product "Symfony" and version "2.8.3"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				2.8.4 Search vendor "Sensiolabs" for product "Symfony" and version "2.8.4"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				2.8.5 Search vendor "Sensiolabs" for product "Symfony" and version "2.8.5"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				3.0.0 Search vendor "Sensiolabs" for product "Symfony" and version "3.0.0"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				3.0.1 Search vendor "Sensiolabs" for product "Symfony" and version "3.0.1"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				3.0.2 Search vendor "Sensiolabs" for product "Symfony" and version "3.0.2"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				3.0.3 Search vendor "Sensiolabs" for product "Symfony" and version "3.0.3"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				3.0.4 Search vendor "Sensiolabs" for product "Symfony" and version "3.0.4"		-		Affected
Sensiolabs Search vendor "Sensiolabs"		Symfony Search vendor "Sensiolabs" for product "Symfony"				3.0.5 Search vendor "Sensiolabs" for product "Symfony" and version "3.0.5"		-		Affected