{"id":"CVE-2025-52955","state":"PUBLISHED","title":"Junos OS and Junos OS Evolved: When jflow/sflow is configured continuous logical interface flaps causes rpd crash and restart","description":"An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a memory corruption that leads to a rpd crash. \n\n\n\n\n\n\n\n\n\n\n\nWhen\nthe logical interface using a routing instance flaps continuously, specific updates are sent to the jflow/sflow modules. This results in memory corruption, leading to an rpd crash and restart. \n\n\nContinued receipt of these specific updates will cause a sustained Denial of Service condition.\n\n\nThis issue affects Junos OS:\n\n  *  All versions before 21.2R3-S9, \n  *  All versions of 21.4, \n  *  All versions of 22.2, \n  *  from 22.4 before 22.4R3-S7, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2.\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions of 21.2-EVO, \n  *  All versions of 21.4-EVO, \n  *  All versions of 22.2-EVO, \n  *  from 22.4 before 22.4R3-S7-EVO, \n  *  from 23.2 before 23.2R2-S3-EVO, \n  *  from 23.4 before 23.4R2-S4-EVO, \n  *  from 24.2 before 24.2R2-EVO.","publishedAt":"2025-07-11T14:42:20.206Z","updatedAt":"2025-08-20T18:32:11.120Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/U:Green","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-S9","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4*","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S7","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S3","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S4","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2","versionType":"semver"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.2*-EVO","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4*-EVO","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*-EVO","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S7-EVO","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S3-EVO","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S4-EVO","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-EVO","versionType":"semver"}]}],"references":["https://supportportal.juniper.net/JSA100062"],"weaknesses":["CWE-131"],"ingestedAt":"2026-10-29T20:09:31.862Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/52xxx/CVE-2025-52955.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-52955","state":"PUBLISHED","datePublished":"2025-07-11T14:42:20.206Z","dateUpdated":"2025-08-20T18:32:11.120Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2025-06-23T13:16:01.410Z"},"containers":{"cna":{"title":"Junos OS and Junos OS Evolved: When jflow/sflow is configured continuous logical interface flaps causes rpd crash and restart","descriptions":[{"lang":"en","value":"An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a memory corruption that leads to a rpd crash. \n\n\n\n\n\n\n\n\n\n\n\nWhen\nthe logical interface using a routing instance flaps continuously, specific updates are sent to the jflow/sflow modules. This results in memory corruption, leading to an rpd crash and restart. \n\n\nContinued receipt of these specific updates will cause a sustained Denial of Service condition.\n\n\nThis issue affects Junos OS:\n\n  *  All versions before 21.2R3-S9, \n  *  All versions of 21.4, \n  *  All versions of 22.2, \n  *  from 22.4 before 22.4R3-S7, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2.\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions of 21.2-EVO, \n  *  All versions of 21.4-EVO, \n  *  All versions of 22.2-EVO, \n  *  from 22.4 before 22.4R3-S7-EVO, \n  *  from 23.2 before 23.2R2-S3-EVO, \n  *  from 23.4 before 23.4R2-S4-EVO, \n  *  from 24.2 before 24.2R2-EVO."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.2R3-S9","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4*","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S7","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S3","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S4","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2","versionType":"semver"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.2*-EVO","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4*-EVO","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2*-EVO","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S7-EVO","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S3-EVO","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S4-EVO","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-EVO","versionType":"semver"}]}],"references":[{"url":"https://supportportal.juniper.net/JSA100062","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"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"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"AUTOMATIC","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"GREEN","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/U:Green","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-131","description":"CWE-131 Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2025-08-20T18:32:11.120Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>This issue only happens when jflow is configured:</p><code>  [services flow-monitoring (version-ipfix|version9)]</code><br>"}],"value":"This issue only happens when jflow is configured:\n\n  [services flow-monitoring (version-ipfix|version9)]"}],"datePublic":"2025-07-09T16:00:00.000Z","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><br>Junos OS: 21.2R3-S9, 22.4R3-S7, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases.<br><br><span style=\"background-color: rgb(255, 255, 255);\">Junos OS Evolved: 22.4R3-S7-EVO, </span>23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO,&nbsp;and all subsequent releases.<br><br>"}],"value":"The following software releases have been updated to resolve this specific issue: \n\nJunos OS: 21.2R3-S9, 22.4R3-S7, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases.\n\nJunos OS Evolved: 22.4R3-S7-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO, and all subsequent releases."}],"source":{"advisory":"JSA100062","defect":["1834075"],"discovery":"USER"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Limit CLI access to trusted users shall avoid this situation<br><br>"}],"value":"Limit CLI access to trusted users shall avoid this situation"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-07-11T20:09:13.568277Z","id":"CVE-2025-52955","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":"2025-07-11T20:09:23.457Z"}}]}}}