CVE-2023-49105Bypass de autenticación en ownCloud core
ownCloud contains an improper authentication vulnerability that allows an attacker to access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured.
Ver en NVDAnálisis
Esta vulnerabilidad crítica en ownCloud permite a atacantes remotos acceder, modificar o eliminar archivos sin autenticación si conocen el nombre de usuario de la víctima. El fallo se debe a la aceptación incorrecta de URLs prefirmadas y está siendo explotado activamente en entornos reales. Es indispensable actualizar las instancias de ownCloud core a la versión 10.13.1 o superior de inmediato.
Roles relevantes
Severidad
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCWE-287CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
Afecta
owncloud:owncloud_serverDescripción técnica
An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.