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gunicorn@0.4.1 vulnerabilities

WSGI HTTP Server for UNIX

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Direct Vulnerabilities

Known vulnerabilities in the gunicorn package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • H
HTTP Request Smuggling

gunicorn is a Python WSGI HTTP Server for UNIX

Affected versions of this package are vulnerable to HTTP Request Smuggling due to the improper validation of Transfer-Encoding headers. An attacker can bypass security restrictions and access restricted endpoints by crafting requests with conflicting Transfer-Encoding headers.

Notes:

  1. This is only exploitable if users have a network path which does not filter out invalid requests;

  2. Users are advised to block access to restricted endpoints via a firewall or other mechanism until a fix can be developed.

  3. This issue arises from the application's incorrectly processing of requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified.

How to fix HTTP Request Smuggling?

Upgrade gunicorn to version 22.0.0 or higher.

[,22.0.0)
  • L
Improper Input Validation

gunicorn is a Python WSGI HTTP Server for UNIX

Affected versions of this package are vulnerable to Improper Input Validation. Gunicorn fails with a 500, instead of a 400, when a request path is a malformed IPv6 address. This is due to no raise 'InvalidRequestLine' exception when the line contains malicious data.

How to fix Improper Input Validation?

Upgrade gunicorn to version 19.4.0 or higher.

[,19.4.0)
  • M
HTTP Request Smuggling

gunicorn is a Python WSGI HTTP Server for UNIX

Affected versions of this package are vulnerable to HTTP Request Smuggling. It fails to properly process the Transfer-Encoding and Content-Length headers when both are present in a package request. This allows for conflicting information to be sent regarding the length of the package, which when processed by back-end servers under certain configurations would allow for malicious users to bypass security controls, gain unauthorized access to sensitive data, and directly compromise other application users.

How to fix HTTP Request Smuggling?

Upgrade gunicorn to version 19.10.0, 20.0.1 or higher.

[,19.10.0) [20.0.0,20.0.1)
  • H
HTTP Response Splitting

gunicorn is a WSGI HTTP Server for UNIX, fast clients and sleepy applications.

Affected versions of this package are vulnerable to HTTP Response Splitting in the process_headers function.

How to fix HTTP Response Splitting?

Upgrade gunicorn to version 19.5.0 or higher.

[,19.5.0)
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