// For flags

CVE-2015-4050

Debian Security Advisory 3276-1

Severity Score

4.3
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

FragmentListener in the HttpKernel component in Symfony 2.3.19 through 2.3.28, 2.4.9 through 2.4.10, 2.5.4 through 2.5.11, and 2.6.0 through 2.6.7, when ESI or SSI support enabled, does not check if the _controller attribute is set, which allows remote attackers to bypass URL signing and security rules by including (1) no hash or (2) an invalid hash in a request to /_fragment.

FragmentListener en el componente HttpKernel en Symfony 2.3.19 hasta 2.3.28, 2.4.9 hasta 2.4.10, 2.5.4 hasta 2.5.11, y 2.6.0 hasta 2.6.7, cuando ek soporte ESI o SSI está habilitado, no comprueba si el atributo _controller esta configurado, lo que permite a atacantes remotos evadir la firma de URLs y las reglas de seguridad mediante la inclusión de (1) ningún hash o (2) un hash inválido en una solicitud a /_fragment.

Jakub Zalas discovered that Symfony, a framework to create websites and web applications, was vulnerable to restriction bypass. It was affecting applications with ESI or SSI support enabled, that use the FragmentListener. A malicious user could call any controller via the /_fragment path by providing an invalid hash in the URL (or removing it), bypassing URL signing and security rules.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2015-05-21 CVE Reserved
  • 2015-06-01 CVE Published
  • 2024-08-06 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-284: Improper Access Control
CAPEC
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"
2.3.19
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.19"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.20
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.20"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.21
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.21"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.22
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.22"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.23
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.23"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.24
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.24"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.25
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.25"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.26
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.26"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.27
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.27"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.3.28
Search vendor "Sensiolabs" for product "Symfony" and version "2.3.28"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.4.9
Search vendor "Sensiolabs" for product "Symfony" and version "2.4.9"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.4.10
Search vendor "Sensiolabs" for product "Symfony" and version "2.4.10"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.4
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.4"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.5
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.5"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.6
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.6"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.7
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.7"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.8
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.8"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.9
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.9"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.10
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.10"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.5.11
Search vendor "Sensiolabs" for product "Symfony" and version "2.5.11"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.0
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.0"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.1
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.1"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.3
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.3"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.4
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.4"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.5
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.5"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.6
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.6"
-
Affected
Sensiolabs
Search vendor "Sensiolabs"
Symfony
Search vendor "Sensiolabs" for product "Symfony"
2.6.7
Search vendor "Sensiolabs" for product "Symfony" and version "2.6.7"
-
Affected