{"id":"CVE-2025-59960","state":"PUBLISHED","title":"Junos OS and Junos OS Evolved: DHCP Option 82 messages from clients being passed unmodified to the DHCP server","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server.\n\n\n\nBy default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a specific DHCP DISCOVER is received in 'forward-only' mode with Option 82, the device should drop the message unless 'trust-option82' is configured. Instead, the DHCP relay forwards these packets to the DHCP server unmodified, which uses up addresses in the DHCP server's address pool, ultimately leading to address pool exhaustion.\n\nThis issue affects Junos OS: \n\n\n\n  *  all versions before 21.2R3-S10,\n  *  from 21.4 before 21.4R3-S12,\n  *  all versions of 22.2,\n  *  from 22.4 before 22.4R3-S8, \n  *  from 23.2 before 23.2R2-S5, \n  *  from 23.4 before 23.4R2-S6, \n  *  from 24.2 before 24.2R2-S2, \n  *  from 24.4 before 24.4R2, \n  *  from 25.2 before 25.2R1-S1, 25.2R2.\n\n\n\n\nJunos OS Evolved:\n\n\n\n  *  all versions before 21.4R3-S12-EVO, \n  *  all versions of 22.2-EVO,\n  *  from 22.4 before 22.4R3-S8-EVO, \n  *  from 23.2 before 23.2R2-S5-EVO, \n  *  from 23.4 before 23.4R2-S6-EVO, \n  *  from 24.2 before 24.2R2-S2-EVO, \n  *  from 24.4 before 24.4R2-EVO, \n  *  from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.","publishedAt":"2026-01-15T20:14:00.582Z","updatedAt":"2026-01-16T16:27:58.152Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:H/AU:Y/R:U/V:C/RE:M/U:Amber","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS","Juniper Networks Junos OS Evolved"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.2R3-S10","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S12","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S8","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S5","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S6","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S2","versionType":"semver"},{"version":"24.4","status":"affected","lessThan":"24.4R2","versionType":"semver"},{"version":"25.2","status":"affected","lessThan":"25.2R1-S1, 25.2R2","versionType":"semver"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S12-EVO","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S8-EVO","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S5-EVO","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S6-EVO","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S2-EVO","versionType":"semver"},{"version":"24.4","status":"affected","lessThan":"24.4R2-EVO","versionType":"semver"},{"version":"25.2","status":"affected","lessThan":"25.2R1-S1-EVO, 25.2R2-EVO","versionType":"semver"}]}],"references":["https://supportportal.juniper.net/","https://kb.juniper.net/JSA103149"],"weaknesses":["CWE-754"],"ingestedAt":"2026-10-29T20:09:39.787Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/59xxx/CVE-2025-59960.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-59960","state":"PUBLISHED","datePublished":"2026-01-15T20:14:00.582Z","dateUpdated":"2026-01-16T16:27:58.152Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2025-09-23T18:19:06.954Z"},"containers":{"cna":{"title":"Junos OS and Junos OS Evolved: DHCP Option 82 messages from clients being passed unmodified to the DHCP server","descriptions":[{"lang":"en","value":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server.\n\n\n\nBy default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a specific DHCP DISCOVER is received in 'forward-only' mode with Option 82, the device should drop the message unless 'trust-option82' is configured. Instead, the DHCP relay forwards these packets to the DHCP server unmodified, which uses up addresses in the DHCP server's address pool, ultimately leading to address pool exhaustion.\n\nThis issue affects Junos OS: \n\n\n\n  *  all versions before 21.2R3-S10,\n  *  from 21.4 before 21.4R3-S12,\n  *  all versions of 22.2,\n  *  from 22.4 before 22.4R3-S8, \n  *  from 23.2 before 23.2R2-S5, \n  *  from 23.4 before 23.4R2-S6, \n  *  from 24.2 before 24.2R2-S2, \n  *  from 24.4 before 24.4R2, \n  *  from 25.2 before 25.2R1-S1, 25.2R2.\n\n\n\n\nJunos OS Evolved:\n\n\n\n  *  all versions before 21.4R3-S12-EVO, \n  *  all versions of 22.2-EVO,\n  *  from 22.4 before 22.4R3-S8-EVO, \n  *  from 23.2 before 23.2R2-S5-EVO, \n  *  from 23.4 before 23.4R2-S6-EVO, \n  *  from 24.2 before 24.2R2-S2-EVO, \n  *  from 24.4 before 24.4R2-EVO, \n  *  from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.2R3-S10","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S12","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S8","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S5","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S6","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S2","versionType":"semver"},{"version":"24.4","status":"affected","lessThan":"24.4R2","versionType":"semver"},{"version":"25.2","status":"affected","lessThan":"25.2R1-S1, 25.2R2","versionType":"semver"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S12-EVO","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S8-EVO","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S5-EVO","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S6-EVO","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S2-EVO","versionType":"semver"},{"version":"24.4","status":"affected","lessThan":"24.4R2-EVO","versionType":"semver"},{"version":"25.2","status":"affected","lessThan":"25.2R1-S1-EVO, 25.2R2-EVO","versionType":"semver"}]}],"references":[{"url":"https://supportportal.juniper.net/","tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA103149","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"YES","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"CONCENTRATED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:H/AU:Y/R:U/V:C/RE:M/U:Amber","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-754","description":"CWE-754 Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2026-01-15T20:14:00.582Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"DHCP Relay must be configured for forward-only to be vulnerable to this issue:<br><br><tt>[ forwarding-options dhcp-relay forward-only ]<br></tt>"}],"value":"DHCP Relay must be configured for forward-only to be vulnerable to this issue:\n\n[ forwarding-options dhcp-relay forward-only ]"}],"datePublic":"2026-01-14T17:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue: <br>Junos OS 21.2R3-S10, 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S2, 24.4R2, 25.2R1-S1, 25.2R2, 25.4R1, and all subsequent releases.<br>\n\nJunos OS Evolved 21.4R3-S12-EVO, 22.4R3-S8-EVO, 23.2R2-S5-EVO, 23.4R2-S6-EVO, 24.2R2-S2-EVO, 24.4R2-EVO, 25.2R1-S1-EVO, 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases.\n\n<br>"}],"value":"The following software releases have been updated to resolve this specific issue: \nJunos OS 21.2R3-S10, 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S2, 24.4R2, 25.2R1-S1, 25.2R2, 25.4R1, and all subsequent releases.\n\n\nJunos OS Evolved 21.4R3-S12-EVO, 22.4R3-S8-EVO, 23.2R2-S5-EVO, 23.4R2-S6-EVO, 24.2R2-S2-EVO, 24.4R2-EVO, 25.2R1-S1-EVO, 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."}],"source":{"advisory":"JSA103149","defect":["1876407"],"discovery":"USER"},"timeline":[{"lang":"en","time":"2026-01-14T17:00:00.000Z","value":"Initial Publication"}],"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"There are no known workarounds for this issue."}],"value":"There are no known workarounds for this issue."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-16T16:27:50.519720Z","id":"CVE-2025-59960","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-16T16:27:58.152Z"}}]}}}