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When an attacker sends an SIP packets with a malformed SDP field then the SIP ALG can not process it which will lead to an FPC crash and restart. Continued receipt of these specific packets will lead to a sustained Denial of Service. This issue can only occur when both below mentioned conditions are fulfilled: 1. Call distribution needs to be enabled: [security alg sip enable-call-distribution] 2. The SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. To confirm whether SIP ALG is enabled on SRX, and MX with SPC3 use the following command: user@host> show security alg status | match sip SIP : Enabled This issue affects Juniper Networks Junos OS on SRX 5000 Series: 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S3; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S2; 22.1 versions prior to 22.1R2-S2, 22.1R3; 22.2 versions prior to 22.2R3; 22.3 versions prior to 22.3R1-S1, 22.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1."}, {"lang": "es", "value": "Una vulnerabilidad de Improper Validation of Array Index en SIP ALG de Juniper Networks Junos OS en la serie SRX 5000 permite que un atacante no autenticado provoque una denegaci\u00f3n de servicio (DoS). Cuando un atacante env\u00eda paquetes SIP con un campo SDP con formato incorrecto, SIP ALG no puede procesarlo, lo que provocar\u00e1 un bloqueo y reinicio del FPC. La recepci\u00f3n continua de estos paquetes espec\u00edficos dar\u00e1 lugar a una Denegaci\u00f3n de Servicio sostenida. Este problema solo puede ocurrir cuando se cumplen las dos condiciones mencionadas a continuaci\u00f3n: 1. La distribuci\u00f3n de llamadas debe estar habilitada: [alg de seguridad sip enable-call-distribution] 2. El SIP ALG debe estar habilitado, ya sea impl\u00edcitamente/por defecto o de forma de configuraci\u00f3n. Para confirmar si SIP ALG est\u00e1 habilitado en SRX y MX con SPC3, use el siguiente comando: usuario@host> show security alg status | match sip SIP : Enabled. Este problema afecta a Juniper Networks Junos OS en la serie SRX 5000: versiones 20.4 anteriores a 20.4R3-S5; Versiones 21.1 anteriores a 21.1R3-S4; Versiones 21.2 anteriores a 21.2R3-S3; Versiones 21.3 anteriores a 21.3R3-S3; Versiones 21.4 anteriores a 21.4R3-S2; Versiones 22.1 anteriores a 22.1R2-S2, 22.1R3; Versiones 22.2 anteriores a 22.2R3; Versiones 22.3 anteriores a 22.3R1-S1, 22.3R2. Este problema no afecta a las versiones de Juniper Networks Junos OS anteriores a la 20.4R1."}], "id": "CVE-2023-22408", "lastModified": "2023-01-24T17:13:56.710", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Primary"}]}, "published": "2023-01-13T00:15:11.157", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA70204"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-129"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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