gunicorn@19.5.0 vulnerabilities

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.

Upgrade gunicorn to version 22.0.0 or higher.

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.

Upgrade gunicorn to version 19.10.0, 20.0.1 or higher.