CVE-2022-22157

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JDPI incorrectly classifies out-of-state asymmetric TCP flows as the dynamic-application INCONCLUSIVE instead of UNKNOWN, which is more permissive, causing the firewall to allow traffic to be forwarded that should have been denied. This issue only occurs when 'set security flow tcp-session no-syn-check' is configured on the device. This issue affects Juniper Networks Junos OS on SRX Series: 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R2-S5, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. 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Remove 'security flow tcp-session no-syn-check' from the configuration.\n\n2: Enable AppID cache configuration:\n set services application-identification application-system-cache security-services"}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2022-01-12T17:00:00.000Z", "ID": "CVE-2022-22157", "STATE": "PUBLIC", "TITLE": "Junos OS: SRX Series: Traffic classification vulnerability when 'no-syn-check' is enabled"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"platform": "SRX Series", "version_affected": "<", "version_name": "18.4", "version_value": "18.4R2-S9, 18.4R3-S9"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "19.1", "version_value": "19.1R2-S3, 19.1R3-S6"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "19.2", "version_value": "19.2R1-S7, 19.2R3-S3"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "19.3", "version_value": "19.3R2-S6, 19.3R3-S2"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "19.4", "version_value": "19.4R2-S5, 19.4R3-S3"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "20.1", "version_value": "20.1R2-S2, 20.1R3"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "20.2", "version_value": "20.2R3-S1"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "20.3", "version_value": "20.3R3"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "20.4", "version_value": "20.4R2-S1, 20.4R3"}, {"platform": "SRX Series", "version_affected": "<", "version_name": "21.1", "version_value": "21.1R1-S1, 21.1R2"}, {"version_affected": "!<", "version_value": "18.4R1"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "This issue is only seen when the following configuration is present: \n [security flow tcp-session no-syn-check]"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A traffic classification vulnerability in Juniper Networks Junos OS on the SRX Series Services Gateways may allow an attacker to bypass Juniper Deep Packet Inspection (JDPI) rules and access unauthorized networks or resources, when 'no-syn-check' is enabled on the device. JDPI incorrectly classifies out-of-state asymmetric TCP flows as the dynamic-application INCONCLUSIVE instead of UNKNOWN, which is more permissive, causing the firewall to allow traffic to be forwarded that should have been denied. This issue only occurs when 'set security flow tcp-session no-syn-check' is configured on the device. This issue affects Juniper Networks Junos OS on SRX Series: 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R2-S5, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. 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resources, when 'no-syn-check' is enabled on the device. JDPI incorrectly classifies out-of-state asymmetric TCP flows as the dynamic-application INCONCLUSIVE instead of UNKNOWN, which is more permissive, causing the firewall to allow traffic to be forwarded that should have been denied. This issue only occurs when 'set security flow tcp-session no-syn-check' is configured on the device. This issue affects Juniper Networks Junos OS on SRX Series: 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R2-S5, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 18.4R1."}, {"lang": "es", "value": "Una vulnerabilidad en la clasificaci\u00f3n del tr\u00e1fico en el Sistema Operativo Junos de Juniper Networks en las Puertas de Enlace de Servicios de la serie SRX puede permitir a un atacante omitir las reglas de inspecci\u00f3n profunda de paquetes de Juniper (JDPI) y acceder a redes o recursos no autorizados, cuando se habilita \"no-syn-check\" en el dispositivo. JDPI clasifica incorrectamente los flujos TCP asim\u00e9tricos fuera de estado como la aplicaci\u00f3n din\u00e1mica INCONCLUSIVE en lugar de UNKNOWN, que es m\u00e1s permisiva, causando que el firewall permita el reenv\u00edo de tr\u00e1fico que deber\u00eda haber sido denegado. Este problema s\u00f3lo es producida cuando \"set security flow tcp-session no-syn-check\" est\u00e1 configurado en el dispositivo. Este problema afecta al Sistema Operativo Junos de Juniper Networks en la serie SRX: 18.4 versiones anteriores a 18.4R2-S9, 18.4R3-S9; 19.1 versiones anteriores a 19.1R2-S3, 19.1R3-S6; 19.2 versiones anteriores a 19.2R1-S7, 19.2R3-S3; 19.3 versiones anteriores a 19.3R2-S6, 19.3R3-S2; 19.4 versiones anteriores a 19. 4R2-S5, 19.4R3-S3; 20.1 versiones anteriores a 20.1R2-S2, 20.1R3; 20.2 versiones anteriores a 20.2R3-S1; versiones 20.3 anteriores a 20.3R3; 20.4 versiones anteriores a 20.4R2-S1, 20.4R3; 21.1 versiones anteriores a 21.1R1-S1, 21.1R2. Este problema no afecta a versiones del Sistema Operativo Junos de Juniper Networks anteriores a 18.4R1"}], "id": "CVE-2022-22157", "lastModified": "2026-06-17T04:27:52.743", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.7, "source": "sirt@juniper.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-01-19T01:15:08.450", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11265"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11265"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-863"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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