CVE-2026-33787

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* 25.2 versions before 25.2R1-S1, 25.2R2."}, {"lang": "es", "value": "Una vulnerabilidad de comprobaci\u00f3n incorrecta de condiciones inusuales o excepcionales en el demonio de control del chasis (chassisd) de Juniper Networks Junos OS en SRX1500, SRX4100, SRX4200 y SRX4600 permite a un atacante local con bajos privilegios causar una denegaci\u00f3n de servicio (DoS) completa.\n\nCuando se ejecuta un comando CLI espec\u00edfico show chassis, chassisd falla y se reinicia, lo que causa un impacto moment\u00e1neo en todo el tr\u00e1fico hasta que todos los m\u00f3dulos vuelvan a estar en l\u00ednea.\n\nEste problema afecta a Junos OS en SRX1500, SRX4100, SRX4200 y SRX4600:\n\n * versiones 23.2 anteriores a 23.2R2-S6,\n * versiones 23.4 anteriores a 23.4R2-S7\n * versiones 24.2 anteriores a 24.2R2-S2,\n * versiones 24.4 anteriores a 24.4R2,\n * versiones 25.2 anteriores a 25.2R1-S1, 25.2R2."}], "id": "CVE-2026-33787", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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:Y/R:X/V:X/RE:M/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33787", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-13T17:50:04.608156Z", "version": "2.0.3"}}]}, "published": "2026-04-09T22:16:28.387", "references": [{"source": "sirt@juniper.net", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA107873"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-754"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["srx1500", "srx4100", "srx4200", "srx4600"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,23.2R2-S6)"}}, {"platform": ["srx1500", "srx4100", "srx4200", "srx4600"], "status": "affected", "versions": {"scheme": "generic", "value": "[23.4,23.4R2-S7)"}}, {"platform": ["srx1500", "srx4100", "srx4200", "srx4600"], "status": "affected", "versions": {"scheme": "generic", "value": "[24.2,24.2R2-S2)"}}, {"platform": ["srx1500", "srx4100", "srx4200", "srx4600"], "status": "affected", "versions": {"scheme": "generic", "value": "[24.4,24.4R2)"}}, {"platform": ["srx1500", "srx4100", "srx4200", "srx4600"], "status": "affected", "versions": {"scheme": "generic", "value": "[25.2,25.2R1-S1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Junos OS", "source": "cna", "vendor": "Juniper Networks"}, "product": "junos_os", "vendor": "juniper_networks"}], "analysis": {"en": {"generated_at": "2026-04-09T23:24:20.648230+00:00", "value": {"mitigation_remediation": ["Upgrade Junos OS to at least 23.2R2\u2011S6, 23.4R2\u2011S7, 24.2R2\u2011S2, 24.4R2, 25.2R1\u2011S1, 25.2R2, 25.4R1 or any newer release.", "If an upgrade is not immediately possible, restrict CLI access to trusted hosts using access lists or firewall filters.", "Configure CLI authorization to block execution of the 'show chassis' command for low\u2011privileged users."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Affected devices are Juniper SRX1500, SRX4100, SRX4200, and SRX4600 running Junos OS 23.2 versions older than 23.2R2\u2011S6, 23.4 versions older than 23.4R2\u2011S7, 24.2 versions older than 24.2R2\u2011S2, 24.4 versions older than 24.4R2, and 25.2 versions older than 25.2R1\u2011S1 or 25.2R2.", "description_and_impact": "The vulnerability is located in the chassis control daemon of Junos OS on SRX1500, SRX4100, SRX4200, and SRX4600 routers. A local attacker with low\u2011privilege access can run a specific 'show chassis' command from the CLI, triggering an improper check for unusual conditions in the daemon. When executed, the daemon crashes and automatically restarts, producing a temporary but complete denial of service as all device modules are brought back online. The weakness is classified as CWE\u2011754.", "risk_and_exploitability": "The CVSS score of 6.8 indicates medium severity, but the absence of an EPSS score and a lack of listing in the KEV catalog suggest the vulnerability is not yet widely exploited. The attack requires local CLI access, which could be obtained by a user with low privileges on the device. Because the exploit triggers simply by running the vulnerable command, it is straightforward once local access exists, and the resulting impact is a short service disruption."}}}}, "created": "2026-04-10T08:36:51.421747+00:00", "updated": "2026-04-10T09:27:48.490803+00:00", "vendors": ["juniper_networks", "juniper_networks$PRODUCT$junos_os"]}