// For flags

CVE-2020-10108

python-twisted: HTTP request smuggling when presented with two Content-Length headers

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

1.1%
*EPSS

Affected Versions

11
*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with two content-length headers, it ignored the first header. When the second content-length value was set to zero, the request body was interpreted as a pipelined request.

En Twisted Web versiones hasta 19.10.0, se presentó una vulnerabilidad de división de petición HTTP. Cuando se le presentan dos encabezados content-length, ignora el primer encabezado. Cuando el segundo valor de content-length se estableció en cero, el cuerpo de la petición se interpretó como una petición canalizada "pipelined".

A flaw was found in python-twisted-web, where it does not correctly process HTTP requests, accepting requests with more than one Content-Length header. When the requests sent from and to the python-twisted-web are processed by another component that correctly processes HTTP requests, for example, a proxy, back-end, or web application firewall, a remote attacker can use this flaw to perform an HTTP request smuggling attack. This flaw impacts the system differently based on the type of application and the infrastructure.

Twisted is an event-based framework for internet applications. Twisted Web is a complete web server, aimed at hosting web applications using Twisted and Python, but fully able to serve static pages too. Issues addressed include an HTTP request smuggling vulnerability.

*Credits: N/A
CVSS Scores
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
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
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
  • 2020-03-05 CVE Reserved
  • 2020-03-12 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
Affected Vendors, Products, and Versions (11)