Vulnerabilidad · Publicado 07/10/2026
LMCache en modo distribuido expone un socket ZeroMQ ROUTER sin autenticación que permite a atacantes remotos ejecutar código arbitrario mediante deserialización insegura con pickle. La vulnerabilidad afecta infraestructuras de procesamiento de caché distribuido en centros de datos y servicios en la nube utilizados por empresas en LATAM. Un atacante no autenticado puede registrar procesos maliciosos y comprometer toda la arquitectura de caché compartida.
LMCache multiprocess mode, also called distributed mode, opens an unauthenticated ZeroMQ ROUTER so worker processes can register and share KV cache blocks. Messages on that socket are msgpack. Extension code 1 is passed to DeviceIPCWrapper.Deserialize, which calls pickle.loads, while the server is still decoding request arguments and before the handler runs. A single unauthenticated ZMQ DEALER message to the transport port (default 5555) therefore executes code as the user the LMCache process runs as. Official container images run that process as root. The transport binds to localhost unless the operator sets a routable address with --host, which is how multi-node deployments let peers connect.
Score: 9.8/10 — Severidad: CRITICAL — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-306, CWE-502
Publicado en NIST NVD.