CVE-2023-49082

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.

### Summary Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. ### Details The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. Previous releases performed no validation on the provided value. If an attacker controls the HTTP method it will be used as is and can lead to HTTP request smuggling. ### PoC A minimal example can be found here: https://gist.github.com/jnovikov/7f411ae9fe6a9a7804cf162a3bdbb44b ### Impact If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). ### Workaround If unable to upgrade and using user-provided values for the request method, perform manual validation of the user value (e.g. by restricting it to a few known values like GET, POST etc.). Patch: https://github.com/aio-libs/aiohttp/pull/7806/files

aiohttp es un framework cliente/servidor HTTP asíncrono para asyncio y Python. Una validación inadecuada hace posible que un atacante modifique la solicitud HTTP (por ejemplo, inserte un nuevo encabezado) o incluso cree una nueva solicitud HTTP si el atacante controla el método HTTP. La vulnerabilidad ocurre sólo si el atacante puede controlar el método HTTP (GET, POST, etc.) de la solicitud. Si el atacante puede controlar la versión HTTP de la solicitud, podrá modificar la solicitud (contrabando de solicitudes). Este problema se solucionó en la versión 3.9.0.