CVE-2022-24790 HTTP Request Smuggling in puma

2022-03-3021:50:09

CWE-444

GitHub_M

www.cve.org

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

8.5 High

AI Score

Confidence

High

0.005 Low

EPSS

Percentile

75.8%

JSON

Puma is a simple, fast, multi-threaded, parallel HTTP 1.1 server for Ruby/Rack applications. When using Puma behind a proxy that does not properly validate that the incoming HTTP request matches the RFC7230 standard, Puma and the frontend proxy may disagree on where a request starts and ends. This would allow requests to be smuggled via the front-end proxy to Puma. The vulnerability has been fixed in 5.6.4 and 4.3.12. Users are advised to upgrade as soon as possible. Workaround: when deploying a proxy in front of Puma, turning on any and all functionality to make sure that the request matches the RFC7230 standard.

CNA Affected

[
  {
    "product": "puma",
    "vendor": "puma",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.3.12"
      },
      {
        "status": "affected",
        "version": ">= 5.0.0, <  5.6.4"
      }
    ]
  }
]