// For flags

CVE-2020-10109

python-twisted: HTTP request smuggling when presented with a Content-Length and a chunked Transfer-Encoding header

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*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 a content-length and a chunked encoding header, the content-length took precedence and the remainder of 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 presentó con un encabezado content-length y chunked encoding, el content-length tomó precedencia y el resto del 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 with both Content-Length and Transfer-Encoding headers. 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.

*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
  • 2024-07-06 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Twistedmatrix
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Twisted
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<= 19.10.0
Search vendor "Twistedmatrix" for product "Twisted" and version " <= 19.10.0"
-
Affected
Fedoraproject
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Fedora
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31
Search vendor "Fedoraproject" for product "Fedora" and version "31"
-
Affected
Fedoraproject
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Fedora
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32
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-
Affected
Debian
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Debian Linux
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9.0
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-
Affected
Canonical
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Ubuntu Linux
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14.04
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esm
Affected
Canonical
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Ubuntu Linux
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16.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"
esm
Affected
Canonical
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Ubuntu Linux
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18.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"
lts
Affected
Canonical
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Ubuntu Linux
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19.10
Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"
-
Affected