// For flags

CVE-2024-23829

aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input. Being more lenient than internet standards require could, depending on deployment environment, assist in request smuggling. The unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities. This vulnerability exists due to an incomplete fix for CVE-2023-47627. Version 3.9.2 fixes this vulnerability.

aiohttp es un framework cliente/servidor HTTP asíncrono para asyncio y Python. Las partes sensibles a la seguridad del analizador HTTP de Python conservaron diferencias menores en los conjuntos de caracteres permitidos, que deben activar el manejo de errores para hacer coincidir de manera sólida los límites de marco de los servidores proxy para proteger contra la inyección de solicitudes adicionales. Además, la validación podría desencadenar excepciones que no se manejaron de manera consistente con el procesamiento de otras entradas con formato incorrecto. Ser más indulgente de lo que exigen los estándares de Internet podría, según el entorno de implementación, ayudar en el contrabando de solicitudes. La excepción no controlada podría causar un consumo excesivo de recursos en el servidor de aplicaciones y/o sus instalaciones de registro. Esta vulnerabilidad existe debido a una solución incompleta para CVE-2023-47627. La versión 3.9.2 corrige esta vulnerabilidad.

An HTTP request smuggling vulnerability was found in aiohttp. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets that must trigger error handling to robustly match frame boundaries of proxies in order to protect against the injection of additional requests.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-01-22 CVE Reserved
  • 2024-01-29 CVE Published
  • 2024-02-08 EPSS Updated
  • 2024-11-12 CVE Updated
  • 2024-11-12 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
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
Aiohttp
Search vendor "Aiohttp"
Aiohttp
Search vendor "Aiohttp" for product "Aiohttp"
< 3.9.2
Search vendor "Aiohttp" for product "Aiohttp" and version " < 3.9.2"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
Fedora
Search vendor "Fedoraproject" for product "Fedora"
39
Search vendor "Fedoraproject" for product "Fedora" and version "39"
-
Affected