CVE-2019-10149

Estado: AnalizadaCrítica (9.8)⚠ Explotación activa💥 Exploit

A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 9.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 100%
Percentil entre todas las CVEs puntuadas: 100
Fecha de la puntuación: 29/9/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

CISA KEV — explotada activamente

Añadida al catálogo: 10/1/2022
Plazo de remediación: 10/7/2022
Uso conocido en ransomware: Unknown

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Módulo de Metasploit (exploit fiable y al alcance de cualquiera) · Exim 4.87 - 4.91 Local Privilege Escalation
Publicado en Exploit-DB · Exim 4.87 / 4.91 - Local Privilege Escalation (Metasploit) (26/8/2019)
Publicado en Exploit-DB · Exim 4.87 - 4.91 - Local Privilege Escalation (17/6/2019)
Publicado en Exploit-DB · Exim 4.87 < 4.91 - (Local / Remote) Command Execution (5/6/2019)
Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access95 %
Impacto principalT1059 Command and Scripting Interpreterexecution95 %

Exim expone función deliver_message() sin validación de direcciones de destinatario (CWE-78), permitiendo RCE remota sin autenticación (AV:N PR:N). Ejecuta comandos del sistema e impacta integridad/confidencialidad críticas.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Vulnerability Scanning Restrict Web-Based Content Network Segmentation Limit Software Installation Limit Access to Resource Over Network

Tecnologías afectadas (3)

Canonical — Ubuntu Linux Debian — Debian Linux Exim — Exim

CWE

CWE-78
CWE-78

Referencias

JSON original (NVD)

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