Vulnerabilidad · Publicado 21/09/2026
Se identificó un defecto en la lógica de validación de firmas de noobaa-core que afecta la puerta de enlace multicloud de NooBaa. El servicio no rechaza correctamente solicitudes S3 con presigned URLs que contienen headers x-amz- sin firmar, permitiendo a atacantes eludir mecanismos de autenticación Signature Version 4 (SigV4). Empresas en LATAM que usan NooBaa para gestión de almacenamiento multicloud están en riesgo de acceso no autorizado a datos sensibles.
A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests containing unsigned x-amz- headers, instead simply dropping them from the signature calculation. This allows an attacker who possesses a valid presigned PUT URL to add an unsigned x-amz-copy-source header, effectively converting a simple upload into a CopyObject operation. This can lead to unauthorized access and copying of any data the original signer is permitted to reach across the entire storage system.
Score: 7.1/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CWE-347
Publicado en NIST NVD.