{"id":"CVE-2020-1671","state":"PUBLISHED","title":"Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash.","description":"On Juniper Networks Junos OS platforms configured as DHCPv6 local server or DHCPv6 Relay Agent, Juniper Networks Dynamic Host Configuration Protocol Daemon (JDHCPD) process might crash with a core dump if a malformed DHCPv6 packet is received, resulting with the restart of the daemon. This issue only affects DHCPv6, it does not affect DHCPv4. This issue affects: Juniper Networks Junos OS 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.2X75 versions prior to 18.2X75-D65; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.2 version 19.2R2 and later versions; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2; This issue does not affect Juniper Networks Junos OS prior to 17.4R1.","publishedAt":"2020-10-16T20:31:30.432Z","updatedAt":"2024-09-17T01:00:53.408Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"unspecified","status":"unaffected","lessThan":"17.4R1","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R2-S12, 17.4R3-S3","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R3-S11","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R3-S6","versionType":"custom"},{"version":"18.2X75","status":"affected","lessThan":"18.2X75-D65","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R2-S4, 18.3R3-S3","versionType":"custom"},{"version":"18.4","status":"affected","lessThan":"18.4R2-S5, 18.4R3-S4","versionType":"custom"},{"version":"19.1","status":"affected","lessThan":"19.1R3-S2","versionType":"custom"},{"version":"19.2","status":"affected","lessThan":"19.2R1-S5, 19.2R3","changes":[{"at":"19.2R2","status":"affected"}],"versionType":"custom"},{"version":"19.3","status":"affected","lessThan":"19.3R2-S4, 19.3R3","versionType":"custom"},{"version":"19.4","status":"affected","lessThan":"19.4R1-S3, 19.4R2-S2, 19.4R3","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R1-S3, 20.1R2","versionType":"custom"}]}],"references":["https://kb.juniper.net/JSA11068"],"weaknesses":["CWE-119","CWE-125"],"ingestedAt":"2026-10-29T19:46:49.649Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/1xxx/CVE-2020-1671.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-1671","state":"PUBLISHED","datePublished":"2020-10-16T20:31:30.432Z","dateUpdated":"2024-09-17T01:00:53.408Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2019-11-04T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash.","descriptions":[{"lang":"en","value":"On Juniper Networks Junos OS platforms configured as DHCPv6 local server or DHCPv6 Relay Agent, Juniper Networks Dynamic Host Configuration Protocol Daemon (JDHCPD) process might crash with a core dump if a malformed DHCPv6 packet is received, resulting with the restart of the daemon. This issue only affects DHCPv6, it does not affect DHCPv4. This issue affects: Juniper Networks Junos OS 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.2X75 versions prior to 18.2X75-D65; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.2 version 19.2R2 and later versions; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2; This issue does not affect Juniper Networks Junos OS prior to 17.4R1."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"unspecified","status":"unaffected","lessThan":"17.4R1","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R2-S12, 17.4R3-S3","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R3-S11","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R3-S6","versionType":"custom"},{"version":"18.2X75","status":"affected","lessThan":"18.2X75-D65","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R2-S4, 18.3R3-S3","versionType":"custom"},{"version":"18.4","status":"affected","lessThan":"18.4R2-S5, 18.4R3-S4","versionType":"custom"},{"version":"19.1","status":"affected","lessThan":"19.1R3-S2","versionType":"custom"},{"version":"19.2","status":"affected","lessThan":"19.2R1-S5, 19.2R3","changes":[{"at":"19.2R2","status":"affected"}],"versionType":"custom"},{"version":"19.3","status":"affected","lessThan":"19.3R2-S4, 19.3R3","versionType":"custom"},{"version":"19.4","status":"affected","lessThan":"19.4R1-S3, 19.4R2-S2, 19.4R3","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R1-S3, 20.1R2","versionType":"custom"}]}],"references":[{"url":"https://kb.juniper.net/JSA11068","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","dateUpdated":"2020-10-16T20:31:30.000Z","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968"},"configurations":[{"lang":"en","value":"The example of DHCPv6 local server configuration stanza affected by this issue is:\n   [system services dhcp-local-server dhcpv6]\n\nThe example of configuration stanza for DHCPv6 Relay Agent affected by this issue is: \n   [forwarding-options dhcp-relay dhcpv6]"}],"datePublic":"2020-10-14T00:00:00.000Z","exploits":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS 17.4R2-S12, 17.4R3-S3, 18.1R3-S11, 18.2R3-S6, 18.2X75-D65, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R2-S4, 19.3R3, 19.4R1-S3, 19.4R2-S2, 19.4R3, 20.1R1-S3, 20.1R2, 20.2R1 and all subsequent releases."}],"source":{"advisory":"JSA11068","defect":["1511782"],"discovery":"USER"},"workarounds":[{"lang":"en","value":"There are no viable workarounds for this issue."}],"x_generator":{"engine":"Vulnogram 0.0.9"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"sirt@juniper.net","DATE_PUBLIC":"2020-10-14T07:00:00.000Z","ID":"CVE-2020-1671","STATE":"PUBLIC","TITLE":"Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash."},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Junos OS","version":{"version_data":[{"version_affected":"<","version_name":"17.4","version_value":"17.4R2-S12, 17.4R3-S3"},{"version_affected":"<","version_name":"18.1","version_value":"18.1R3-S11"},{"version_affected":"<","version_name":"18.2","version_value":"18.2R3-S6"},{"version_affected":"<","version_name":"18.2X75","version_value":"18.2X75-D65"},{"version_affected":"<","version_name":"18.3","version_value":"18.3R2-S4, 18.3R3-S3"},{"version_affected":"<","version_name":"18.4","version_value":"18.4R2-S5, 18.4R3-S4"},{"version_affected":"<","version_name":"19.1","version_value":"19.1R3-S2"},{"version_affected":"<","version_name":"19.2","version_value":"19.2R1-S5, 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Protocol Daemon (JDHCPD) process might crash with a core dump if a malformed DHCPv6 packet is received, resulting with the restart of the daemon. This issue only affects DHCPv6, it does not affect DHCPv4. This issue affects: Juniper Networks Junos OS 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.2X75 versions prior to 18.2X75-D65; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.2 version 19.2R2 and later versions; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2; This issue does not affect Juniper Networks Junos OS prior to 17.4R1."}]},"exploit":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"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"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]},{"description":[{"lang":"eng","value":"CWE-125 Out-of-bounds Read"}]}]},"references":{"reference_data":[{"name":"https://kb.juniper.net/JSA11068","refsource":"CONFIRM","url":"https://kb.juniper.net/JSA11068"}]},"solution":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS 17.4R2-S12, 17.4R3-S3, 18.1R3-S11, 18.2R3-S6, 18.2X75-D65, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R2-S4, 19.3R3, 19.4R1-S3, 19.4R2-S2, 19.4R3, 20.1R1-S3, 20.1R2, 20.2R1 and all subsequent releases."}],"source":{"advisory":"JSA11068","defect":["1511782"],"discovery":"USER"},"work_around":[{"lang":"en","value":"There are no viable workarounds for this issue."}]}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://kb.juniper.net/JSA11068","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T06:46:29.907Z"}}]}}}