Vulnerabilidad · Publicado 07/08/2026 · Actualizado 08/08/2026
Klever-Go (implementación en Go del protocolo blockchain Klever) contiene una vulnerabilidad de amplificación en la lógica de resolución P2P que permite a un peer conectado enviar solicitudes comprimidas de 442 bytes que se expanden a 200,000 entradas de hash, saturando los recursos del servidor. Esta vulnerabilidad (CVSS 7.5) afecta especialmente a nodos de blockchain y plataformas financieras en LATAM que dependen de este protocolo. El impacto incluye degradación severa del servicio, pérdida de conectividad de red y potencial indisponibilidad de sistemas altas de transacción.
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.18, the P2P resolver request handling logic is vulnerable to hash-array amplification. A connected peer can send a compressed RequestDataType_HashArrayType direct request that is only 442 bytes on the wire but expands into 200,000 decoded hash entries inside the resolver path. The resolver's antiflood logic counts only a single logical message and the compressed wire size, and while Batch.Decompress() caps the decompressed byte size, it never limits the number of decoded repeated-field items. As a result, both TxResolver and TrieNodeResolver preallocate and iterate over the entire unchecked set of decoded hashes, causing remote memory and CPU amplification against any node that accepts P2P peer connections. This issue is fixed in version 1.7.18.
Score: 7.5/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-400
Publicado en NIST NVD.