{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-36842", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2023-06-27T16:17:25.276Z", "datePublished": "2024-01-12T00:48:25.108Z", "dateUpdated": "2025-06-17T21:09:17.603Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["MX Series", "EX Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "20.4R3-S9", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "21.2R3-S7", "status": "affected", "version": "21.2", "versionType": "semver"}, {"lessThan": "21.3R3-S5", "status": "affected", "version": "21.3", "versionType": "semver"}, {"lessThan": "21.4R3-S5", "status": "affected", "version": "21.4", "versionType": "semver"}, {"lessThan": "22.1R3-S4", "status": "affected", "version": "22.1", "versionType": "semver"}, {"lessThan": "22.2R3-S3", "status": "affected", "version": "22.2", "versionType": "semver"}, {"lessThan": "22.3R3-S2", "status": "affected", "version": "22.3", "versionType": "semver"}, {"lessThan": "22.4R2-S2, 22.4R3", "status": "affected", "version": "22.4", "versionType": "semver"}, {"lessThan": "23.2R2", "status": "affected", "version": "23.2", "versionType": "semver"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>To be affected a device must be configured with:</p><code> [ forwarding-options dhcp-relay group &lt;group-name&gt; interface ... ]</code><br/><p>or</p><code> [ system services dhcp-local-server group &lt;group-name&gt; interface ... ]</code><br/>"}], "value": "To be affected a device must be configured with:\n\n [ forwarding-options dhcp-relay group <group-name> interface ... ]\nor\n\n [ system services dhcp-local-server group <group-name> interface ... ]\n"}], "datePublic": "2024-01-10T17:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "\n\n<p>An Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles resulting in a Denial of Service (DoS).</p><p>On Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. 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"4B3B2FE1-C228-46BE-AC76-70C2687050AE", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*", "matchCriteriaId": "F1B16FF0-900F-4AEE-B670-A537139F6909", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*", "matchCriteriaId": "B227E831-30FF-4BE1-B8B2-31829A5610A6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles resulting in a Denial of Service (DoS).\n\nOn Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. The DHCP process will have to be restarted to recover the service.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n * All versions earlier than 20.4R3-S9;\n * 21.2 versions earlier than 21.2R3-S7;\n * 21.3 versions earlier than 21.3R3-S5;\n * 21.4 versions earlier than 21.4R3-S5;\n * 22.1 versions earlier than 22.1R3-S4;\n * 22.2 versions earlier than 22.2R3-S3;\n * 22.3 versions earlier than 22.3R3-S2;\n * 22.4 versions earlier than 22.4R2-S2, 22.4R3;\n * 23.2 versions earlier than 23.2R2.\n\n\n\n\n\n\n"}, {"lang": "es", "value": "Una verificaci\u00f3n inadecuada de la vulnerabilidad de condiciones inusuales o excepcionales en Juniper DHCP Daemon (jdhcpd) de Juniper Networks Junos OS permite que un atacante adyacente no autenticado haga que jdhcpd consuma todos los ciclos de la CPU, lo que resulta en una denegaci\u00f3n de servicio (DoS). En dispositivos Junos OS con forward-snooped-client configurado, si un atacante env\u00eda un paquete DHCP espec\u00edfico a una interfaz no configurada, esto provocar\u00e1 un bucle infinito. Ser\u00e1 necesario reiniciar el proceso DHCP para recuperar el servicio. Este problema afecta a: Juniper Networks Junos OS * Todas las versiones anteriores a 20.4R3-S9; * Versiones 21.2 anteriores a 21.2R3-S7; * Versiones 21.3 anteriores a 21.3R3-S5; * Versiones 21.4 anteriores a 21.4R3-S5; * Versiones 22.1 anteriores a 22.1R3-S4; * Versiones 22.2 anteriores a 22.2R3-S3; * Versiones 22.3 anteriores a 22.3R3-S2; * Versiones 22.4 anteriores a 22.4R2-S2, 22.4R3; * Versiones 23.2 anteriores a 23.2R2."}], "id": "CVE-2023-36842", "lastModified": "2024-11-21T08:10:43.597", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-01-12T01:15:45.820", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA75730"}, {"source": "sirt@juniper.net", "tags": ["Not Applicable"], "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA75730"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Not Applicable"], "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-703"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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