CVE-2021-33393
lfs/backup en IPFire versión 2.25-core155 no asegura que el achivo /var/ipfire/backup/bin/backup.pl sea propiedad de la cuenta root. Podría ser propiedad de una cuenta no privilegiada, lo que podría potencialmente ser usado para instalar un script troyano backup.pl que luego es ejecutado por root. Problemas similares con la propiedad/permisos de otros archivos pueden presentarse también
CVSS
- Puntuación base
- 8.8
- Versión
- 3.1
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días
- 59 %
- Percentil entre todas las CVEs puntuadas
- 99
- Fecha de la puntuación
- 27/10/2026
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).
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) · IPFire 2.25 Core Update 156 and Prior pakfire.cgi Authenticated RCE
- Publicado en Exploit-DB · IPFire 2.25 - Remote Code Execution (Authenticated) (17/5/2021)
- 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.
Tecnologías afectadas (1)
CWE
- NVD-CWE-Other
Referencias
Mostrar las 8 referencias
- http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html
- https://github.com/MucahitSaratar/ipfire-2-25-auth-rce
- https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6
- https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17
- http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html
- https://github.com/MucahitSaratar/ipfire-2-25-auth-rce
- https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6
- https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17
JSON original (NVD)
Mostrar
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"value": "lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root. Similar problems with the ownership/permissions of other files may be present as well."
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"value": "lfs/backup en IPFire versión 2.25-core155 no asegura que el achivo /var/ipfire/backup/bin/backup.pl sea propiedad de la cuenta root. Podría ser propiedad de una cuenta no privilegiada, lo que podría potencialmente ser usado para instalar un script troyano backup.pl que luego es ejecutado por root. Problemas similares con la propiedad/permisos de otros archivos pueden presentarse también"
}
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