CVE-2024-27983

An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.

An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.

Un atacante puede hacer que el servidor HTTP/2 de Node.js no esté completamente disponible enviando una pequeña cantidad de paquetes de tramas HTTP/2 con algunas tramas HTTP/2 en su interior. Es posible dejar algunos datos en la memoria nghttp2 después del reinicio cuando los encabezados con el frame de CONTINUATION HTTP/2 se envían al servidor y luego el cliente cierra abruptamente una conexión TCP activando el destructor Http2Session mientras los frames de encabezado aún se están procesando (y almacenando en la memoria) causando una condición de ejecución.