// For flags

CVE-2020-15233

OAuth2 Redirect URL validity does not respect query parameters and character casing for loopback addresses

Severity Score

4.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

ORY Fosite is a security first OAuth2 & OpenID Connect framework for Go. In Fosite from version 0.30.2 and before version 0.34.1, there is an issue in which an an attacker can override the registered redirect URL by performing an OAuth flow and requesting a redirect URL that is to the loopback adapter. Attackers can provide both custom URL query parameters to their loopback redirect URL, as well as actually overriding the host of the registered redirect URL. These attacks are only applicable in scenarios where the attacker has access over the loopback interface. This vulnerability has been patched in ORY Fosite v0.34.1.

ORY Fosite es el primer framework de seguridad OAuth2 y OpenID Connect para Go. En Fosite desde la versión 0.30.2 y versiones anteriores a 0.34.1, se presenta un problema en el que un atacante puede anular la URL de redireccionamiento registrada realizando un flujo de OAuth y solicitando una URL de redireccionamiento al adaptador de loopback. Los atacantes pueden proporcionar parámetros de consulta de URL personalizados a su URL de redireccionamiento de loopback, así como también anular el host de la URL de redireccionamiento registrada. Estos ataques solo son aplicables en escenarios donde el atacante tiene acceso por medio de la interfaz de loopback. Esta vulnerabilidad ha sido parcheada en ORY Fosite versión v0.34.1

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-06-25 CVE Reserved
  • 2020-10-02 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Ory
Search vendor "Ory"
 Fosite
Search vendor "Ory" for product "Fosite"
 >= 0.30.2 < 0.34.1
Search vendor "Ory" for product "Fosite" and version " >= 0.30.2 < 0.34.1"
-
Affected