CVE-2026-111225
Netgate pfSense CE 2.5.0 hasta 2.9.0 contiene una vulnerabilidad de inyección de comandos del sistema operativo en openvpn.learn-address.sh que permite a clientes VPN autenticados ejecutar comandos como el usuario unbound. Los atacantes pueden incrustar metacaracteres de shell en el nombre común del certificado o en el nombre de usuario, que se interpolan sin comillas en cadenas su -c, cuando el registro de clientes del DNS Resolver está habilitado.
Traducción automática del texto original de NVD (en inglés).
CVSS
- Puntuación base
- 2.3
- Versión
- 4.0
- Vector
- CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días
- 6.21 %
- Percentil entre todas las CVEs puntuadas
- 93
- Fecha de la puntuación
- 20/10/2026
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).
Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1059Command and Scripting Interpreterexecution85 %
Vector AV:N con PR:L y UI:N exige cliente VPN autenticado; el CN o usuario se interpola sin comillas en cadenas su -c y ejecuta comandos como unbound (CWE-78).
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
Tecnologías afectadas (1)
CWE
- CWE-78
Referencias
Mostrar las 4 referencias
- https://abraxaslabs.tech/research/pfsense-ce-leftovers
- https://github.com/abraxas/pfsense-ovpn-learn-cn
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/sbin/openvpn.learn-address.sh#L57-L62
- https://www.vulncheck.com/advisories/netgate-pfsense-ce-2.5.0-through-2.9.0-os-command-injection-via-openvpn-learn-address-sh
JSON original (NVD)
Mostrar
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