[Security] Bump gunicorn from 21.2.0 to 22.0.0

Bumps gunicorn from 21.2.0 to 22.0.0. This update includes a security fix.

Vulnerabilities fixed

Request smuggling leading to endpoint restriction bypass in Gunicorn Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability has been shown to allow access to endpoints restricted by gunicorn.

To be affected users must have a network path which does not filter out invalid requests. These users are advised to block access to restricted endpoints via a firewall or other mechanism until a fix can be developed.

Patched versions: 22.0.0 Affected versions: <= 21.2.0; < 22.0.0

Release notes

Sourced from gunicorn's releases.

Gunicorn 22.0 has been released

Gunicorn 22.0.0 has been released. This version fix the numerous security vulnerabilities. You're invited to upgrade asap your own installation.

Changes:

22.0.0 - 2024-04-17
===================

use utime to notify workers liveness
migrate setup to pyproject.toml
fix numerous security vulnerabilities in HTTP parser (closing some request smuggling vectors)
parsing additional requests is no longer attempted past unsupported request framing
on HTTP versions < 1.1 support for chunked transfer is refused (only used in exploits)
requests conflicting configured or passed SCRIPT_NAME now produce a verbose error
Trailer fields are no longer inspected for headers indicating secure scheme
support Python 3.12

** Breaking changes **

minimum version is Python 3.7
the limitations on valid characters in the HTTP method have been bounded to Internet Standards
requests specifying unsupported transfer coding (order) are refused by default (rare)
HTTP methods are no longer casefolded by default (IANA method registry contains none affected)
HTTP methods containing the number sign (#) are no longer accepted by default (rare)
HTTP versions < 1.0 or >= 2.0 are no longer accepted by default (rare, only HTTP/1.1 is supported)
HTTP versions consisting of multiple digits or containing a prefix/suffix are no longer accepted
HTTP header field names Gunicorn cannot safely map to variables are silently dropped, as in other software
HTTP headers with empty field name are refused by default (no legitimate use cases, used in exploits)
requests with both Transfer-Encoding and Content-Length are refused by default (such a message might indicate an attempt to perform request smuggling)
empty transfer codings are no longer permitted (reportedly seen with really old & broken proxies)

** SECURITY **

fix CVE-2024-1135

1. Documentation is available there: https://docs.gunicorn.org/en/stable/news.html
2. Packages: https://pypi.org/project/gunicorn/

Commits

• f63d59e bump to 22.0
• 4ac81e0 Merge pull request #3175 from e-kwsm/typo
• 401cecf Merge pull request #3179 from dhdaines/exclude-eventlet-0360
• 0243ec3 fix(deps): exclude eventlet 0.36.0
• 628a0bc chore: fix typos
• 88fc4a4 Merge pull request #3131 from pajod/patch-py12-rebased
• deae2fc CI: back off the agressive timeout
• f470382 docs: promise 3.12 compat
• 5e30bfa add changelog to project.urls (updated for PEP621)
• 481c3f9 remove setup.cfg - overridden by pyproject.toml
• Additional commits viewable in compare view