// For flags

CVE-2023-40175

Inconsistent Interpretation of HTTP Requests in puma

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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.

Puma es un servidor web Ruby/Rack construido para paralelismo. Antes de las versiones 6.3.1 y 5.6.7, Puma mostraba un comportamiento incorrecto al analizar cuerpos de codificación de transferencia en trozos y cabeceras Content-Length de longitud cero de forma que permitía el contrabando de peticiones HTTP. La gravedad de este problema depende en gran medida de la naturaleza del sitio web que utiliza Puma. Esto podría ser causado por un análisis incorrecto de los campos finales en los cuerpos de codificación de transferencia en trozos o por el análisis de cabeceras Content-Length en blanco/longitud cero. Ambos problemas han sido solucionados y esta vulnerabilidad ha sido corregida en las versiones 6.3.1 y 5.6.7.Se recomienda a los usuarios que actualicen. No se conocen soluciones para esta vulnerabilidad.

An HTTP request smuggling attack vulnerability was found in Rubygem Puma. This flaw allows an attacker to gain unauthorized access to sensitive data due to an inconsistent interpretation of HTTP requests.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-08-09 CVE Reserved
  • 2023-08-18 CVE Published
  • 2024-09-19 EPSS Updated
  • 2024-10-07 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Puma
Search vendor "Puma"
 Puma
Search vendor "Puma" for product "Puma"
 < 5.6.7
Search vendor "Puma" for product "Puma" and version " < 5.6.7"
ruby
Affected
Puma
Search vendor "Puma"
 Puma
Search vendor "Puma" for product "Puma"
 >= 6.0.0 < 6.3.1
Search vendor "Puma" for product "Puma" and version " >= 6.0.0 < 6.3.1"
ruby
Affected