CVE-2023-40175 Inconsistent Interpretation of HTTP Requests in puma

2023-08-1821:35:47

CWE-444

GitHub_M

www.cve.org

puma

http request smuggling

chunked transfer encoding

CVSS3

7.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

AI Score

9.5

Confidence

High

EPSS

0.005

Percentile

75.8%

JSON

Puma is a Ruby/Rack web server built for parallelism. Prior to versions 6.3.1 and 5.6.7, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling. Severity of this issue is highly dependent on the nature of the web site using puma is. This could be caused by either incorrect parsing of trailing fields in chunked transfer encoding bodies or by parsing of blank/zero-length Content-Length headers. Both issues have been addressed and this vulnerability has been fixed in versions 6.3.1 and 5.6.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CNA Affected

[
  {
    "vendor": "puma",
    "product": "puma",
    "versions": [
      {
        "version": "< 5.6.7",
        "status": "affected"
      },
      {
        "version": ">= 6.0.0, < 6.3.1",
        "status": "affected"
      }
    ]
  }
]