{"id":"CVE-2023-36835","state":"PUBLISHED","title":"Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnel","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS).\n\nIf a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover.\n\nThis issue affects Juniper Networks Junos OS on QFX10000:\n20.3 version 20.3R1 and later versions;\n20.4 versions prior to 20.4R3-S5;\n21.1 versions prior to 21.1R3-S5;\n21.2 versions prior to 21.2R3-S5;\n21.3 versions prior to 21.3R3-S4;\n21.4 versions prior to 21.4R3-S1;\n22.1 versions prior to 22.1R3;\n22.2 versions prior to 22.2R2;\n22.3 versions prior to 22.3R1-S2, 22.3R2.\n","publishedAt":"2023-07-14T17:11:26.454Z","updatedAt":"2024-11-07T14:24:52.880Z","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","defaultStatus":"unaffected","versions":[{"version":"20.3","status":"affected","lessThan":"20.3*","changes":[{"at":"20.3R1","status":"affected"}],"versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R3-S5","versionType":"custom"},{"version":"21.1","status":"affected","lessThan":"21.1R3-S5","versionType":"custom"},{"version":"21.2","status":"affected","lessThan":"21.2R3-S5","versionType":"custom"},{"version":"21.3","status":"affected","lessThan":"21.3R3-S4","versionType":"custom"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S1","versionType":"custom"},{"version":"22.1","status":"affected","lessThan":"22.1R3","versionType":"custom"},{"version":"22.2","status":"affected","lessThan":"22.2R2","versionType":"custom"},{"version":"22.3","status":"affected","lessThan":"22.3R1-S2, 22.3R2","versionType":"custom"}],"platforms":["QFX10000 Series"]}],"references":["https://supportportal.juniper.net/JSA71642"],"weaknesses":["CWE-754"],"ingestedAt":"2026-10-29T20:06:08.715Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/36xxx/CVE-2023-36835.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-36835","state":"PUBLISHED","datePublished":"2023-07-14T17:11:26.454Z","dateUpdated":"2024-11-07T14:24:52.880Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2023-06-27T16:17:25.276Z"},"containers":{"cna":{"title":"Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnel","descriptions":[{"lang":"en","value":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS).\n\nIf a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover.\n\nThis issue affects Juniper Networks Junos OS on QFX10000:\n20.3 version 20.3R1 and later versions;\n20.4 versions prior to 20.4R3-S5;\n21.1 versions prior to 21.1R3-S5;\n21.2 versions prior to 21.2R3-S5;\n21.3 versions prior to 21.3R3-S4;\n21.4 versions prior to 21.4R3-S1;\n22.1 versions prior to 22.1R3;\n22.2 versions prior to 22.2R2;\n22.3 versions prior to 22.3R1-S2, 22.3R2.\n"}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"20.3","status":"affected","lessThan":"20.3*","changes":[{"at":"20.3R1","status":"affected"}],"versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R3-S5","versionType":"custom"},{"version":"21.1","status":"affected","lessThan":"21.1R3-S5","versionType":"custom"},{"version":"21.2","status":"affected","lessThan":"21.2R3-S5","versionType":"custom"},{"version":"21.3","status":"affected","lessThan":"21.3R3-S4","versionType":"custom"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S1","versionType":"custom"},{"version":"22.1","status":"affected","lessThan":"22.1R3","versionType":"custom"},{"version":"22.2","status":"affected","lessThan":"22.2R2","versionType":"custom"},{"version":"22.3","status":"affected","lessThan":"22.3R1-S2, 22.3R2","versionType":"custom"}],"platforms":["QFX10000 Series"]}],"references":[{"url":"https://supportportal.juniper.net/JSA71642"}],"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"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-754","description":"CWE-754 Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}]},{"descriptions":[{"description":"Denial of Service (DoS)","lang":"en"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2023-07-14T17:11:26.454Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"To be exposed to this issue the QFX device needs be configured for VXLAN with either of the following statements:<br><br><tt>&nbsp; [ vlans &lt;vlan&gt; vxlan ]<br><br>&nbsp; [ routing-instances &lt;routing-instance&gt; vxlan ]</tt>"}],"value":"To be exposed to this issue the QFX device needs be configured for VXLAN with either of the following statements:\n\n  [ vlans <vlan> vxlan ]\n\n  [ routing-instances <routing-instance> vxlan ]"}],"datePublic":"2023-07-12T16:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.<br>"}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\n"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S5, 21.1R3-S5, 21.2R3-S5, 21.3R3-S4, 21.4R3-S1, 22.1R3, 22.2R2, 22.3R1-S2, 22.3R2, 22.4R1, and all subsequent releases.<br>"}],"value":"The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S5, 21.1R3-S5, 21.2R3-S5, 21.3R3-S4, 21.4R3-S1, 22.1R3, 22.2R2, 22.3R1-S2, 22.3R2, 22.4R1, and all subsequent releases.\n"}],"source":{"advisory":"JSA71642","defect":["1678992"],"discovery":"USER"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"There are no known workarounds for this issue.<br>"}],"value":"There are no known workarounds for this issue.\n"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://supportportal.juniper.net/JSA71642","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T17:01:09.846Z"}},{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"juniper_networks","product":"junos_os","defaultStatus":"unknown","versions":[{"version":"20.3","status":"affected","lessThan":"20.3*","versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R3-S5","versionType":"custom"},{"version":"21.1","status":"affected","lessThan":"21.1R3-S5","versionType":"custom"},{"version":"21.2","status":"affected","lessThan":"21.2R3-S5","versionType":"custom"},{"version":"21.3","status":"affected","lessThan":"21.3R3-S4","versionType":"custom"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S1","versionType":"custom"},{"version":"22.1","status":"affected","lessThan":"22.1R3","versionType":"custom"},{"version":"22.2","status":"affected","lessThan":"22.2R2","versionType":"custom"},{"version":"22.3","status":"affected","lessThan":"22.3R1-S2","versionType":"custom"},{"version":"22.3","status":"affected","lessThan":"22.3R2","versionType":"custom"}],"cpes":["cpe:2.3:a:juniper_networks:junos_os:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-11-07T14:18:56.731957Z","id":"CVE-2023-36835","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":"2024-11-07T14:24:52.880Z"}}]}}}