// For flags

CVE-2021-39171

Unlimited transforms allowed for signed nodes

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Passport-SAML is a SAML 2.0 authentication provider for Passport, the Node.js authentication library. Prior to version 3.1.0, a malicious SAML payload can require transforms that consume significant system resources to process, thereby resulting in reduced or denied service. This would be an effective way to perform a denial-of-service attack. This has been resolved in version 3.1.0. The resolution is to limit the number of allowable transforms to 2.

Passport-SAML es un proveedor de autenticación SAML versión 2.0 para Passport, la biblioteca de autenticación de Node.js. Anterior a la versión 3.1.0, una carga útil SAML maliciosa puede requerir transformaciones que consumen recursos significativos del sistema para procesar, y por lo tanto, resultando en un servicio reducido o denegado. Esta sería una manera efectiva de llevar a cabo un ataque de denegación de servicio. Esto ha sido resuelto en versión 3.1.0. La resolución consiste en limitar el número de transformaciones permitidas a 2.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-08-16 CVE Reserved
  • 2021-08-27 CVE Published
  • 2024-05-12 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Passport-saml Project
Search vendor "Passport-saml Project"
 Passport-saml
Search vendor "Passport-saml Project" for product "Passport-saml"
 < 3.1.0
Search vendor "Passport-saml Project" for product "Passport-saml" and version " < 3.1.0"
node.js
Affected