CVE-2023-36833

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This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service.<br><br>An indication that the system experienced this issue is the following log message:<br><br><tt>&nbsp; &lt;date&gt; &lt;hostname&gt; evo-aftmand-bt[&lt;pid&gt;]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes<br><br>\n\n</tt><br><span style=\"background-color: rgb(255, 255, 255);\">This issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202:</span><br><span style=\"background-color: rgb(255, 255, 255);\">21.2 version 21.2R1-EVO and later versions;</span><br><span style=\"background-color: rgb(255, 255, 255);\">21.3 version 21.3R1-EVO and later versions;</span><br><span style=\"background-color: rgb(255, 255, 255);\">21.4 versions prior to 21.4R3-S3-EVO;</span><br><span style=\"background-color: rgb(255, 255, 255);\">22.1 version 22.1R1-EVO and later versions;</span><br><span style=\"background-color: rgb(255, 255, 255);\">22.2 versions prior to 22.2R3-S2-EVO;</span><br><span style=\"background-color: rgb(255, 255, 255);\">22.3 versions prior to 22.3R3-EVO;</span><br><span style=\"background-color: rgb(255, 255, 255);\">22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.</span><br><tt>\n\n<br></tt>"}], "value": "A Use After Free vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS Evolved on PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202 allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nThe process 'aftman-bt' will crash after multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. 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This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service.\n\nAn indication that the system experienced this issue is the following log message:\n\n\u00a0 <date> <hostname> evo-aftmand-bt[<pid>]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes\n\n\n\n\nThis issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202:\n21.2 version 21.2R1-EVO and later versions;\n21.3 version 21.3R1-EVO and later versions;\n21.4 versions prior to 21.4R3-S3-EVO;\n22.1 version 22.1R1-EVO and later versions;\n22.2 versions prior to 22.2R3-S2-EVO;\n22.3 versions prior to 22.3R3-EVO;\n22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.\n\n\n\n", "supportingMedia": [{"type": "text/html", "value": "A Use After Free vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS Evolved on PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202 allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).<br><br>The process 'aftman-bt' will crash after multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. 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multicast-only fast reroute (MoFRR) enabled interface. This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service.\n\nAn indication that the system experienced this issue is the following log message:\n\n\u00a0 <date> <hostname> evo-aftmand-bt[<pid>]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes\n\n\n\n\nThis issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202:\n21.2 version 21.2R1-EVO and later versions;\n21.3 version 21.3R1-EVO and later versions;\n21.4 versions prior to 21.4R3-S3-EVO;\n22.1 version 22.1R1-EVO and later versions;\n22.2 versions prior to 22.2R3-S2-EVO;\n22.3 versions prior to 22.3R3-EVO;\n22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.\n\n\n\n"}], "id": "CVE-2023-36833", "lastModified": "2026-06-17T06:07:10.720", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-36833", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-22T14:20:03.605266Z", "version": "2.0.3"}}]}, "published": "2023-07-14T17:15:09.133", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA71640"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA71640"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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