CVE-2023-36844
Estado: AnalizadaMedia (5.3)⚠ Explotación activa
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables.
Using a crafted request an attacker is able to modify
certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series:
prior to
prior to
prior to
prior to
prior to
23.2R1-S1, 23.2R2.
Detalles técnicos trazas, registros y código del informe original
* All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions 21.3R3-S5; * 21.4 versions 21.4R3-S5; * 22.1 versions 22.1R3-S4; * 22.2 versions 22.2R3-S2; * 22.3 versions prior to 22.3R3-S1; * 22.4 versions 22.4R2-S2, 22.4R3; * 23.2 versions prior to
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Puntuación base: 5.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 90%
- Percentil entre todas las CVEs puntuadas: 100
- Fecha de la puntuación: 1/10/2026
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).
CISA KEV — explotada activamente
- Añadida al catálogo: 13/11/2023
- Plazo de remediación: 17/11/2023
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto principal
T1565.002Transmitted Data Manipulationimpact70 %
Vulnerabilidad en J-Web (aplicación expuesta) que permite a atacante no autenticado modificar variables PHP críticas vía solicitud crafted (AV:N, PR:N, UI:N). El vector CVSS indica pérdida parcial de integridad (I:L), coherente con manipulación de datos/variables.
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-473
- NVD-CWE-Other
Referencias
- http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html
- https://supportportal.juniper.net/JSA72300
- http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html
- https://supportportal.juniper.net/JSA72300
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36844
JSON original (NVD)
Mostrar
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"sourceIdentifier": "sirt@juniper.net",
"cisaRequiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Juniper Junos OS EX Series PHP External Variable Modification Vulnerability"
}