{
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        "providerMetadata": {
          "dateUpdated": "2024-08-01T22:27:35.547Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
              "vendor-advisory",
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            "url": "https://supportportal.juniper.net/JSA75757"
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              "technical-description",
              "x_transferred"
            ],
            "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "MX Series",
            "SRX Series"
          ],
          "product": "Junos OS",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "21.2R3-S6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "21.3R3-S5",
              "status": "affected",
              "version": "21.3",
              "versionType": "semver"
            },
            {
              "lessThan": "21.4R3-S5",
              "status": "affected",
              "version": "21.4",
              "versionType": "semver"
            },
            {
              "lessThan": "22.1R3-S4",
              "status": "affected",
              "version": "22.1",
              "versionType": "semver"
            },
            {
              "lessThan": "22.2R3-S3",
              "status": "affected",
              "version": "22.2",
              "versionType": "semver"
            },
            {
              "lessThan": "22.3R3-S1",
              "status": "affected",
              "version": "22.3",
              "versionType": "semver"
            },
            {
              "lessThan": "22.4R2-S2, 22.4R3",
              "status": "affected",
              "version": "22.4",
              "versionType": "semver"
            },
            {
              "lessThan": "23.2R1-S1, 23.2R2",
              "status": "affected",
              "version": "23.2",
              "versionType": "semver"
            }
          ]
        }
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          "lang": "en",
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              "value": "\u003cp\u003eTo be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration.\u003c/p\u003e\u003cp\u003ePlease verify on SRX with:\u003c/p\u003e\u003ccode\u003e  user@host\u0026gt; show security alg status | match sip\u003c/code\u003e\u003cbr/\u003e\u003ccode\u003e  SIP : Enabled\u003c/code\u003e\u003cbr/\u003e\u003cp\u003ePlease verify on MX whether the following is configured:\u003c/p\u003e\u003ccode\u003e  user@host\u0026gt; show security alg status | match sip\u003c/code\u003e\u003cbr/\u003e\u003ccode\u003e  SIP : Enabled\u003c/code\u003e\u003cbr/\u003e\u003ccode\u003e  [services ... rule \u0026lt;rule-name\u0026gt; (term \u0026lt;term-name\u0026gt; ) from/match application/application-set \u0026lt;name\u0026gt;]\u003c/code\u003e\u003cbr/\u003e\u003cp\u003ewhere either\u003c/p\u003e\u003ccode\u003e  a. name = junos-sip\u003c/code\u003e\u003cbr/\u003e\u003cp\u003eor an application or application-set refers to SIP:\u003c/p\u003e\u003ccode\u003e  b. [applications application \u0026lt;name\u0026gt; application-protocol sip]\u003c/code\u003e\u003cbr/\u003e\u003cp\u003eor\u003c/p\u003e\u003ccode\u003e  c. [applications application-set \u0026lt;name\u0026gt; application junos-sip]\u003c/code\u003e\u003cbr/\u003e"
            }
          ],
          "value": "To be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration.\n\nPlease verify on SRX with:\n\n  user@host\u003e show security alg status | match sip\n  SIP : Enabled\nPlease verify on MX whether the following is configured:\n\n  user@host\u003e show security alg status | match sip\n  SIP : Enabled\n  [services ... rule \u003crule-name\u003e (term \u003cterm-name\u003e ) from/match application/application-set \u003cname\u003e]\nwhere either\n\n  a. name = junos-sip\nor an application or application-set refers to SIP:\n\n  b. [applications application \u003cname\u003e application-protocol sip]\nor\n\n  c. [applications application-set \u003cname\u003e application junos-sip]\n"
        }
      ],
      "datePublic": "2024-01-10T17:00:00.000Z",
      "descriptions": [
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          "lang": "en",
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              "value": "\n\n\u003cp\u003eAn Improper Validation of Syntactic Correctness of Input vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS).\u003c/p\u003e\u003cp\u003eOn all Junos OS MX Series and SRX Series platforms, when SIP ALG is enabled, and a specific SIP packet is received and processed, NAT IP allocation fails for genuine traffic, which causes Denial of Service (DoS). Continuous receipt of this specific SIP ALG packet will cause a sustained DoS condition.\u003c/p\u003e\u003cp\u003eNAT IP usage can be monitored by running the following command.\u003c/p\u003e\u003ccode\u003euser@srx\u0026gt; show security nat resource-usage source-pool \u0026lt;source_pool_name\u0026gt;\u003c/code\u003e\u003cbr\u003e\u003cp\u003e\u003c/p\u003e\u003ccode\u003ePool name: source_pool_name\u003c/code\u003e\u003cbr\u003e\u003ccode\u003e..\u003c/code\u003e\u003cbr\u003e\u003ccode\u003eAddress Factor-index Port-range Used Avail Total Usage\u003c/code\u003e\u003cbr\u003e\u003ccode\u003eX.X.X.X\u003c/code\u003e\u003cbr\u003e\u003ccode\u003e0 Single Ports 50258 52342 62464 96% \u0026lt;\u0026lt;\u0026lt;\u0026lt;\u0026lt;\u003c/code\u003e\u003cbr\u003e\u003ccode\u003e- Alg Ports 0 2048 2048 0%\u003c/code\u003e\u003cbr\u003e\u003cp\u003eThis issue affects:\u003c/p\u003e\u003cp\u003eJuniper Networks Junos OS on MX Series and SRX Series\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions earlier than 21.2R3-S6;\u003c/li\u003e\u003cli\u003e21.3 versions earlier than 21.3R3-S5;\u003c/li\u003e\u003cli\u003e21.4 versions earlier than 21.4R3-S5;\u003c/li\u003e\u003cli\u003e22.1 versions earlier than 22.1R3-S4;\u003c/li\u003e\u003cli\u003e22.2 versions earlier than 22.2R3-S3;\u003c/li\u003e\u003cli\u003e22.3 versions earlier than 22.3R3-S1;\u003c/li\u003e\u003cli\u003e22.4 versions earlier than 22.4R2-S2, 22.4R3;\u003c/li\u003e\u003cli\u003e23.2 versions earlier than 23.2R1-S1, 23.2R2.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\n"
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          "value": "\nAn Improper Validation of Syntactic Correctness of Input vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS).\n\nOn all Junos OS MX Series and SRX Series platforms, when SIP ALG is enabled, and a specific SIP packet is received and processed, NAT IP allocation fails for genuine traffic, which causes Denial of Service (DoS). Continuous receipt of this specific SIP ALG packet will cause a sustained DoS condition.\n\nNAT IP usage can be monitored by running the following command.\n\nuser@srx\u003e show security nat resource-usage source-pool \u003csource_pool_name\u003e\n\n\nPool name: source_pool_name\n..\nAddress Factor-index Port-range Used Avail Total Usage\nX.X.X.X\n0 Single Ports 50258 52342 62464 96% \u003c\u003c\u003c\u003c\u003c\n- Alg Ports 0 2048 2048 0%\nThis issue affects:\n\nJuniper Networks Junos OS on MX Series and SRX Series\n\n\n\n  *  All versions earlier than 21.2R3-S6;\n  *  21.3 versions earlier than 21.3R3-S5;\n  *  21.4 versions earlier than 21.4R3-S5;\n  *  22.1 versions earlier than 22.1R3-S4;\n  *  22.2 versions earlier than 22.2R3-S3;\n  *  22.3 versions earlier than 22.3R3-S1;\n  *  22.4 versions earlier than 22.4R2-S2, 22.4R3;\n  *  23.2 versions earlier than 23.2R1-S1, 23.2R2.\n\n\n\n\n\n\n"
        }
      ],
      "exploits": [
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              "value": "\u003cp\u003eJuniper SIRT is not aware of any malicious exploitation of this vulnerability.\u003c/p\u003e"
            }
          ],
          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\n\n"
        }
      ],
      "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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          "format": "CVSS",
          "scenarios": [
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              "value": "GENERAL"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1286",
              "description": "CWE-1286: Improper Validation of Syntactic Correctness of Input",
              "lang": "en",
              "type": "CWE"
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          ]
        },
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          "descriptions": [
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              "description": "Denial of Service (DoS)",
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      "providerMetadata": {
        "dateUpdated": "2024-01-12T00:56:20.566Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
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      "references": [
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          "tags": [
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          "url": "https://supportportal.juniper.net/JSA75757"
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          "tags": [
            "technical-description"
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          "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
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              "value": "\u003cp\u003eThe following software releases have been updated to resolve this specific issue: Junos OS 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S1, 22.4R2-S2, 22.4R3, 23.2R1-S1, 23.2R2, 23.4R1, and all subsequent releases.\u003c/p\u003e"
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          ],
          "value": "The following software releases have been updated to resolve this specific issue: Junos OS 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S1, 22.4R2-S2, 22.4R3, 23.2R1-S1, 23.2R2, 23.4R1, and all subsequent releases.\n\n"
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      "source": {
        "advisory": "JSA75757",
        "defect": [
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        "discovery": "USER"
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          "lang": "en",
          "time": "2024-01-10T17:00:00.000Z",
          "value": "Initial Publication"
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      "title": "Junos OS: MX Series and SRX Series: Processing of a specific SIP packet causes NAT IP allocation to fail",
      "workarounds": [
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              "value": "\u003cp\u003eThere are no known workarounds for this issue, but it should be considered to disable the SIP ALG if it\u0027s not strictly needed.\u003c/p\u003e"
            }
          ],
          "value": "There are no known workarounds for this issue, but it should be considered to disable the SIP ALG if it\u0027s not strictly needed.\n\n"
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  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2024-21616",
    "datePublished": "2024-01-12T00:56:20.566Z",
    "dateReserved": "2023-12-27T19:38:25.710Z",
    "dateUpdated": "2024-08-01T22:27:35.547Z",
    "state": "PUBLISHED"
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}