{
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        "metrics": [
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                "id": "CVE-2023-44186",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "yes"
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-03-06T16:45:50.764805Z",
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "defaultStatus": "unaffected",
          "platforms": [
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          "product": "Junos OS",
          "vendor": "Juniper Networks",
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              "lessThan": "20.4R3-S8",
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              "version": "22.4",
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              "version": "21.4",
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              "status": "affected",
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              "lessThan": "22.2R3-S2-EVO",
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              "version": "22.2",
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              "version": "22.4",
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              "value": "\u003cp\u003eNonstop Active Routing is enabled using the following configuration:\u003c/p\u003e \u003ctt\u003e[edit chassis redundancy]\u003cbr\u003e\u003c/tt\u003e\u003ctt\u003egraceful-switchover;\u003cbr\u003e\u003c/tt\u003e\u003ctt\u003e\u003cbr\u003e[edit routing-options]\u003cbr\u003e\u003c/tt\u003e\u003ctt\u003enonstop-routing;\u003c/tt\u003e"
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          "value": "Nonstop Active Routing is enabled using the following configuration:\n\n [edit chassis redundancy]\ngraceful-switchover;\n\n[edit routing-options]\nnonstop-routing;"
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      "datePublic": "2023-10-11T16:00:00.000Z",
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              "value": "\n\n\u003cp\u003eAn Improper Handling of Exceptional Conditions vulnerability in AS PATH processing of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a BGP update message with an AS PATH containing a large number of 4-byte ASes, leading to a Denial of Service (DoS). Continued receipt and processing of these BGP updates will create a sustained Denial of Service (DoS) condition.\u003c/p\u003e\u003cp\u003eThis issue is hit when the router has Non-Stop Routing (NSR) enabled, has a non-4-byte-AS capable BGP neighbor, receives a BGP update message with a prefix that includes a long AS PATH containing large number of 4-byte ASes, and has to advertise the prefix towards the non-4-byte-AS capable BGP neighbor.\u003c/p\u003eNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\u003cbr\u003e\u003cp\u003eThis issue affects:\u003c/p\u003e\u003cp\u003eJuniper Networks Junos OS:\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions prior to 20.4R3-S8;\u003c/li\u003e\u003cli\u003e21.1 versions 21.1R1 and later;\u003c/li\u003e\u003cli\u003e21.2 versions prior to 21.2R3-S6;\u003c/li\u003e\u003cli\u003e21.3 versions prior to 21.3R3-S5;\u003c/li\u003e\u003cli\u003e21.4 versions prior to 21.4R3-S5;\u003c/li\u003e\u003cli\u003e22.1 versions prior to 22.1R3-S4;\u003c/li\u003e\u003cli\u003e22.2 versions prior to 22.2R3-S2;\u003c/li\u003e\u003cli\u003e22.3 versions prior to 22.3R2-S2, 22.3R3-S1;\u003c/li\u003e\u003cli\u003e22.4 versions prior to 22.4R2-S1, 22.4R3.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003eJuniper Networks Junos OS Evolved\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions prior to 20.4R3-S8-EVO;\u003c/li\u003e\u003cli\u003e21.1 versions 21.1R1-EVO and later;\u003c/li\u003e\u003cli\u003e21.2 versions prior to 21.2R3-S6-EVO;\u003c/li\u003e\u003cli\u003e21.3 versions prior to 21.3R3-S5-EVO;\u003c/li\u003e\u003cli\u003e21.4 versions prior to 21.4R3-S5-EVO;\u003c/li\u003e\u003cli\u003e22.1 versions prior to 22.1R3-S4-EVO;\u003c/li\u003e\u003cli\u003e22.2 versions prior to 22.2R3-S2-EVO;\u003c/li\u003e\u003cli\u003e22.3 versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO;\u003c/li\u003e\u003cli\u003e22.4 versions prior to 22.4R2-S1-EVO, 22.4R3-EVO.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\n"
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          "value": "\nAn Improper Handling of Exceptional Conditions vulnerability in AS PATH processing of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a BGP update message with an AS PATH containing a large number of 4-byte ASes, leading to a Denial of Service (DoS). Continued receipt and processing of these BGP updates will create a sustained Denial of Service (DoS) condition.\n\nThis issue is hit when the router has Non-Stop Routing (NSR) enabled, has a non-4-byte-AS capable BGP neighbor, receives a BGP update message with a prefix that includes a long AS PATH containing large number of 4-byte ASes, and has to advertise the prefix towards the non-4-byte-AS capable BGP neighbor.\n\nNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\nThis issue affects:\n\nJuniper Networks Junos OS:\n\n\n\n  *  All versions prior to 20.4R3-S8;\n  *  21.1 versions 21.1R1 and later;\n  *  21.2 versions prior to 21.2R3-S6;\n  *  21.3 versions prior to 21.3R3-S5;\n  *  21.4 versions prior to 21.4R3-S5;\n  *  22.1 versions prior to 22.1R3-S4;\n  *  22.2 versions prior to 22.2R3-S2;\n  *  22.3 versions prior to 22.3R2-S2, 22.3R3-S1;\n  *  22.4 versions prior to 22.4R2-S1, 22.4R3.\n\n\n\n\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions prior to 20.4R3-S8-EVO;\n  *  21.1 versions 21.1R1-EVO and later;\n  *  21.2 versions prior to 21.2R3-S6-EVO;\n  *  21.3 versions prior to 21.3R3-S5-EVO;\n  *  21.4 versions prior to 21.4R3-S5-EVO;\n  *  22.1 versions prior to 22.1R3-S4-EVO;\n  *  22.2 versions prior to 22.2R3-S2-EVO;\n  *  22.3 versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO;\n  *  22.4 versions prior to 22.4R2-S1-EVO, 22.4R3-EVO.\n\n\n\n\n\n\n"
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              "value": "\u003cp\u003eJuniper SIRT is not aware of any malicious exploitation of this vulnerability.\u003c/p\u003e"
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          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\n\n"
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      ],
      "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"
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              "description": "CWE-755 Improper Handling of Exceptional Conditions",
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        "dateUpdated": "2024-03-05T23:07:57.356Z",
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          "url": "https://supportportal.juniper.net/JSA73150"
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              "value": "\u003cp\u003eThe following software releases have been updated to resolve this specific issue: \u003c/p\u003e\u003cp\u003eJunos OS: 20.4R3-S8, 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2, 22.3R3-S1, 22.4R2-S1, 22.4R3, 23.2R1, and all subsequent releases.\u003c/p\u003e\u003cp\u003eJunos OS Evolved: 20.4R3-S8-EVO, 21.2R3-S6-EVO, 21.3R3-S5-EVO, 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S2-EVO, 22.3R2-S2-EVO, 22.3R3-S1-EVO, 22.4R2-S1-EVO, 22.4R3-EVO, 23.2R1-EVO, and all subsequent releases.\u003c/p\u003e"
            }
          ],
          "value": "The following software releases have been updated to resolve this specific issue: \n\nJunos OS: 20.4R3-S8, 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2, 22.3R3-S1, 22.4R2-S1, 22.4R3, 23.2R1, and all subsequent releases.\n\nJunos OS Evolved: 20.4R3-S8-EVO, 21.2R3-S6-EVO, 21.3R3-S5-EVO, 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S2-EVO, 22.3R2-S2-EVO, 22.3R3-S1-EVO, 22.4R2-S1-EVO, 22.4R3-EVO, 23.2R1-EVO, and all subsequent releases.\n\n"
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      "source": {
        "advisory": "JSA73150",
        "defect": [
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        "discovery": "EXTERNAL"
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          "lang": "en",
          "time": "2023-10-11T16:00:00.000Z",
          "value": "Initial Publication"
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          "time": "2023-10-16T16:00:00.000Z",
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          "time": "2024-03-05T17:00:00.000Z",
          "value": "Updated affected/fixed releases to convey that 23.2R1 and all subsequent releases are fixed."
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      ],
      "title": "Junos OS and Junos OS Evolved: RPD crash when attempting to send a very long AS PATH to a non-4-byte-AS capable BGP neighbor",
      "workarounds": [
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          "lang": "en",
          "value": "Current operational and security best practices, such as limiting the AS PATH length, should mitigate risk of this issue.\n\nBelow is an example configuration to limit AS PATH to 30 entries:\n\nset groups BASE-POLICY policy-options policy-statement MaxAS-Limit-30 term more-than-30 from protocol bgp\nset groups BASE-POLICY policy-options policy-statement MaxAS-Limit-30 term more-than-30 from as-path 31as\nset groups BASE-POLICY policy-options policy-statement MaxAS-Limit-30 term more-than-30 then reject\nset groups BASE-POLICY policy-options policy-statement MaxAS-Limit-30 then accept\nset groups BASE-POLICY policy-options policy-statement Customer-IN term MaxAS-Limit from policy MaxAS-Limit-30\nset groups BASE-BGP protocols bgp group \u003c*-CUSTOMER\u003e import Customer-IN\nset groups BASE-PREFIX-LISTS policy-options as-path 31as \".{31,}\""
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    "assignerShortName": "juniper",
    "cveId": "CVE-2023-44186",
    "datePublished": "2023-10-11T20:08:26.308Z",
    "dateReserved": "2023-09-26T19:30:27.953Z",
    "dateUpdated": "2024-12-03T14:49:41.755Z",
    "state": "PUBLISHED"
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}