Vulnerabilidad · Publicado 08/10/2026
El servicio hmailserver-update en hMailServer 6.3.4 y 6.3.5 ejecuta operaciones como root sin validar correctamente los parámetros de actualización proporcionados por la cuenta de servicio no privilegiada, permitiendo escalado de privilegios. Un atacante con acceso a la cuenta hmailserver podría comprometer completamente el servidor de correo y la infraestructura subyacente. Esta vulnerabilidad afecta directamente a empresas LATAM que ejecutan hMailServer como solución de correo corporativo.
The Linux live-update apply helper (hmailserver-update) of Progressive Robot hMailServer 6.3.4 and 6.3.5 runs as root on a request file written by the unprivileged hmailserver service account, and took from that request the program used to verify an AppImage update's signature and the systemd unit to stop before reading the service account's files. An attacker who already runs code as the hmailserver service account, for example through another flaw in the mail server, can therefore have arbitrary code executed as root, on any Linux installation where the live update's path unit is active - the default for the project's .deb and .rpm packages - and on AppImage installations run under that unit.
Score: 7.8/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-807
Publicado en NIST NVD.