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gunicorn@21.1.0 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
  • L
Improper Check for Unusual or Exceptional Conditions

gunicorn is a Python WSGI HTTP Server for UNIX

Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions due to the use of time.time() in worker timeout logic, which may be wrong. An attacker who can control the system time can force a worker to time out.

How to fix Improper Check for Unusual or Exceptional Conditions?

Upgrade gunicorn to version 21.2.0 or higher.

[,21.2.0)
  • 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)
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