{"id":"CVE-2024-39555","state":"PUBLISHED","title":"Junos OS and Junos OS Evolved: Receipt of a specific malformed BGP update causes the session to reset","description":"An Improper Handling of Exceptional Conditions vulnerability in the Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker sending a specific malformed BGP update message to cause the session to reset, resulting in a Denial of Service (DoS).  Continued receipt and processing of these malformed BGP update messages will create a sustained Denial of Service (DoS) condition.\n\nUpon receipt of a BGP update message over an established BGP session containing a specifically malformed tunnel encapsulation attribute, when segment routing is enabled, internal processing of the malformed attributes within the update results in improper parsing of remaining attributes, leading to session reset:\n\nBGP SEND Notification code 3 (Update Message Error) subcode 1 (invalid attribute list)\n\nOnly systems with segment routing enabled are vulnerable to this issue.\n\nThis issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations, and requires a remote attacker to have at least one established BGP session.\n\nThis issue affects:\n\nJunos OS: \n\n\n  *  All versions before 21.4R3-S8, \n  *  from 22.2 before 22.2R3-S4, \n  *  from 22.3 before 22.3R3-S3, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S1, \n  *  from 23.4 before 23.4R1-S2, 23.4R2.\n\n\nJunos OS Evolved: \n\n  *  All versions before 21.4R3-S8-EVO, \n  *  from 22.2-EVO before 22.2R3-S4-EVO, \n  *  from 22.3-EVO before 22.3R3-S3-EVO, \n  *  from 22.4-EVO before 22.4R3-S3-EVO, \n  *  from 23.2-EVO before 23.2R2-S1-EVO, \n  *  from 23.4-EVO before 23.4R1-S2-EVO, 23.4R2-EVO.","publishedAt":"2024-07-10T22:36:48.706Z","updatedAt":"2024-08-02T04:26:15.946Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A","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":"21.4R3-S8","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2R3-S4","versionType":"semver"},{"version":"22.3","status":"affected","lessThan":"22.3R3-S3","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S3","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S1","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R1-S2, 23.4R2","versionType":"semver"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S8-EVO","versionType":"semver"},{"version":"22.2-EVO","status":"affected","lessThan":"22.2R3-S4-EVO","versionType":"semver"},{"version":"22.3-EVO","status":"affected","lessThan":"22.3R3-S3-EVO","versionType":"semver"},{"version":"22.4-EVO","status":"affected","lessThan":"22.4R3-S3-EVO","versionType":"semver"},{"version":"23.2-EVO","status":"affected","lessThan":"23.2R2-S1-EVO","versionType":"semver"},{"version":"23.4-EVO","status":"affected","lessThan":"23.4R1-S2-EVO, 23.4R2-EVO","versionType":"semver"}]}],"references":["https://supportportal.juniper.net/JSA83015"],"weaknesses":["CWE-755"],"ingestedAt":"2026-10-29T20:07:39.287Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/39xxx/CVE-2024-39555.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-39555","state":"PUBLISHED","datePublished":"2024-07-10T22:36:48.706Z","dateUpdated":"2024-08-02T04:26:15.946Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2024-06-25T15:12:53.247Z"},"containers":{"cna":{"title":"Junos OS and Junos OS Evolved: Receipt of a specific malformed BGP update causes the session to reset","descriptions":[{"lang":"en","value":"An Improper Handling of Exceptional Conditions vulnerability in the Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker sending a specific malformed BGP update message to cause the session to reset, resulting in a Denial of Service (DoS).  Continued receipt and processing of these malformed BGP update messages will create a sustained Denial of Service (DoS) condition.\n\nUpon receipt of a BGP update message over an established BGP session containing a specifically malformed tunnel encapsulation attribute, when segment routing is enabled, internal processing of the malformed attributes within the update results in improper parsing of remaining attributes, leading to session reset:\n\nBGP SEND Notification code 3 (Update Message Error) subcode 1 (invalid attribute list)\n\nOnly systems with segment routing enabled are vulnerable to this issue.\n\nThis issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations, and requires a remote attacker to have at least one established BGP session.\n\nThis issue affects:\n\nJunos OS: \n\n\n  *  All versions before 21.4R3-S8, \n  *  from 22.2 before 22.2R3-S4, \n  *  from 22.3 before 22.3R3-S3, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S1, \n  *  from 23.4 before 23.4R1-S2, 23.4R2.\n\n\nJunos OS Evolved: \n\n  *  All versions before 21.4R3-S8-EVO, \n  *  from 22.2-EVO before 22.2R3-S4-EVO, \n  *  from 22.3-EVO before 22.3R3-S3-EVO, \n  *  from 22.4-EVO before 22.4R3-S3-EVO, \n  *  from 23.2-EVO before 23.2R2-S1-EVO, \n  *  from 23.4-EVO before 23.4R1-S2-EVO, 23.4R2-EVO."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S8","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2R3-S4","versionType":"semver"},{"version":"22.3","status":"affected","lessThan":"22.3R3-S3","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S3","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S1","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R1-S2, 23.4R2","versionType":"semver"}]},{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S8-EVO","versionType":"semver"},{"version":"22.2-EVO","status":"affected","lessThan":"22.2R3-S4-EVO","versionType":"semver"},{"version":"22.3-EVO","status":"affected","lessThan":"22.3R3-S3-EVO","versionType":"semver"},{"version":"22.4-EVO","status":"affected","lessThan":"22.4R3-S3-EVO","versionType":"semver"},{"version":"23.2-EVO","status":"affected","lessThan":"23.2R2-S1-EVO","versionType":"semver"},{"version":"23.4-EVO","status":"affected","lessThan":"23.4R1-S2-EVO, 23.4R2-EVO","versionType":"semver"}]}],"references":[{"url":"https://supportportal.juniper.net/JSA83015","tags":["vendor-advisory"]}],"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"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"AUTOMATIC","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-755","description":"CWE-755 Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2024-07-10T22:37:53.351Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"A sample BGP segment routing configuration is shown below:<br><br><tt>[ protocols bgp group &lt;name&gt; family inet segment-routing-te ] (IPv4)<br>\n\n[ protocols bgp group &lt;name&gt; family inet6 segment-routing-te ] (IPv6)<br></tt>"}],"value":"A sample BGP segment routing configuration is shown below:\n\n[ protocols bgp group <name> family inet segment-routing-te ] (IPv4)\n\n\n[ protocols bgp group <name> family inet6 segment-routing-te ] (IPv6)"}],"datePublic":"2024-07-10T16:00:00.000Z","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> \n<br>Junos OS: 21.4R3-S8, 22.2R3-S4, 22.3R3-S3, 22.4R3-S3, 23.2R2-S1, 23.4R1-S2, 23.4R2, 24.2R1, and all subsequent releases.<br>Junos OS Evolved: 21.4R3-S8-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S3-EVO, 23.2R2-S1-EVO, 23.4R1-S2-EVO, 23.4R2-EVO, 24.2R1-EVO, and all subsequent releases.<br>\n\n\n\n<br>"}],"value":"The following software releases have been updated to resolve this specific issue:\n \n\nJunos OS: 21.4R3-S8, 22.2R3-S4, 22.3R3-S3, 22.4R3-S3, 23.2R2-S1, 23.4R1-S2, 23.4R2, 24.2R1, and all subsequent releases.\nJunos OS Evolved: 21.4R3-S8-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S3-EVO, 23.2R2-S1-EVO, 23.4R1-S2-EVO, 23.4R2-EVO, 24.2R1-EVO, and all subsequent releases."}],"source":{"advisory":"JSA83015","defect":["1787290"],"discovery":"INTERNAL"},"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","affected":[{"vendor":"juniper","product":"junos_os","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S8","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2R3-S4","versionType":"semver"},{"version":"22.3","status":"affected","lessThan":"22.3R3-S3","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R3-S3","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S1","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R1-S2","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2","versionType":"semver"}],"cpes":["cpe:2.3:o:juniper:junos_os:*:*:*:*:*:*:*:*"]},{"vendor":"juniper","product":"junos_os_evolved","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"21.4R3-S8-EVO","versionType":"semver"},{"version":"22.2-EVO","status":"affected","lessThan":"22.2R3-S4-EVO","versionType":"semver"},{"version":"22.3-EVO","status":"affected","lessThan":"22.3R3-S3-EVO","versionType":"semver"},{"version":"22.4-EVO","status":"affected","lessThan":"22.4R3-S3-EVO","versionType":"semver"},{"version":"23.2-EVO","status":"affected","lessThan":"23.2R2-S1-EVO","versionType":"semver"},{"version":"23.4-EVO","status":"affected","lessThan":"23.4R1-S2-EVO","versionType":"semver"},{"version":"23.4-EVO","status":"affected","lessThan":"23.4R2-EVO","versionType":"semver"}],"cpes":["cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-07-11T14:13:23.572231Z","id":"CVE-2024-39555","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-07-12T16:41:46.291Z"}},{"title":"CVE Program Container","references":[{"url":"https://supportportal.juniper.net/JSA83015","tags":["vendor-advisory","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T04:26:15.946Z"}}]}}}