CVE-2023-40175.yml

---
gem: puma
cve: 2023-40175
ghsa: 68xg-gqqm-vgj8
url: https://github.com/puma/puma/security/advisories/GHSA-68xg-gqqm-vgj8
title: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in puma
date: 2023-08-18
description: |
  ### Impact

  Prior to version 6.3.1, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling.

  The following vulnerabilities are addressed by this advisory:
  - Incorrect parsing of trailing fields in chunked transfer encoding bodies
  - Parsing of blank/zero-length Content-Length headers`\r\n`

  ### Patches

  The vulnerability has been fixed in 6.3.1 and 5.6.7.

  ### Workarounds

  No known workarounds.

  ### References

  [HTTP Request Smuggling](https://portswigger.net/web-security/request-smuggling)

cvss_v3: 6.5
patched_versions:
  - '~> 5.6.7'
  - '>= 6.3.1'
related:
  url:
    - https://github.com/puma/puma/releases/tag/v5.6.7
    - https://github.com/puma/puma/releases/tag/v6.3.1
    - https://github.com/puma/puma/commit/690155e7d644b80eeef0a6094f9826ee41f1080a
    - https://github.com/puma/puma/commit/ed0f2f94b56982c687452504b95d5f1fbbe3eed1
    - https://github.com/advisories/GHSA-68xg-gqqm-vgj8