CVE-2024-21600 (GCVE-0-2024-21600)
Vulnerability from cvelistv5
Published
2024-01-12 00:53
Modified
2025-06-17 21:09
CWE
  • CWE-76 - Improper Neutralization of Equivalent Special Elements
  • Denial of Service (DoS)
Summary
An Improper Neutralization of Equivalent Special Elements vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows a unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When MPLS packets are meant to be sent to a flexible tunnel interface (FTI) and if the FTI tunnel is down, these will hit the reject NH, due to which the packets get sent to the CPU and cause a host path wedge condition. This will cause the FPC to hang and requires a manual restart to recover. Please note that this issue specifically affects PTX1000, PTX3000, PTX5000 with FPC3, PTX10002-60C, and PTX10008/16 with LC110x. Other PTX Series devices and Line Cards (LC) are not affected. The following log message can be seen when the issue occurs: Cmerror Op Set: Host Loopback: HOST LOOPBACK WEDGE DETECTED IN PATH ID <id> (URI: /fpc/<fpc>/pfe/<pfe>/cm/<cm>/Host_Loopback/<cm>/HOST_LOOPBACK_MAKE_CMERROR_ID[<id>]) This issue affects Juniper Networks Junos OS: * All versions earlier than 20.4R3-S8; * 21.1 versions earlier than 21.1R3-S4; * 21.2 versions earlier than 21.2R3-S6; * 21.3 versions earlier than 21.3R3-S3; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R2-S2, 22.1R3; * 22.2 versions earlier than 22.2R2-S1, 22.2R3.
Impacted products
Vendor Product Version
Juniper Networks Junos OS Version: 0   
Version: 21.1   
Version: 21.2   
Version: 21.3   
Version: 21.4   
Version: 22.1   
Version: 22.2   
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Other PTX Series devices and Line Cards (LC) are not affected.\\n\\nThe following log message can be seen when the issue occurs:\\n\\nCmerror Op Set: Host Loopback: HOST LOOPBACK WEDGE DETECTED IN PATH ID \u003cid\u003e (URI: /fpc/\u003cfpc\u003e/pfe/\u003cpfe\u003e/cm/\u003ccm\u003e/Host_Loopback/\u003ccm\u003e/HOST_LOOPBACK_MAKE_CMERROR_ID[\u003cid\u003e])\\nThis issue affects Juniper Networks Junos OS:\\n\\n\\n\\n  *  All versions earlier than 20.4R3-S8;\\n  *  21.1 versions earlier than 21.1R3-S4;\\n  *  21.2 versions earlier than 21.2R3-S6;\\n  *  21.3 versions earlier than 21.3R3-S3;\\n  *  21.4 versions earlier than 21.4R3-S5;\\n  *  22.1 versions earlier than 22.1R2-S2, 22.1R3;\\n  *  22.2 versions earlier than 22.2R2-S1, 22.2R3.\\n\\n\\n\\n\\n\\n\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\\n\\n\u003cp\u003eAn Improper Neutralization of Equivalent Special Elements vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows a unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\u003c/p\u003e\u003cp\u003eWhen MPLS packets are meant to be sent to a flexible tunnel interface (FTI) and if the FTI tunnel is down, these will hit the reject NH, due to which the packets get sent to the CPU and cause a host path wedge condition. This will cause the FPC to hang and requires a manual restart to recover.\u003c/p\u003e\u003cp\u003ePlease note that this issue specifically affects PTX1000, PTX3000, PTX5000 with FPC3, PTX10002-60C, and PTX10008/16 with LC110x. Other PTX Series devices and Line Cards (LC) are not affected.\u003c/p\u003e\u003cp\u003eThe following log message can be seen when the issue occurs:\u003c/p\u003e\u003ccode\u003eCmerror Op Set: Host Loopback: HOST LOOPBACK WEDGE DETECTED IN PATH ID \u0026lt;id\u0026gt; (URI: /fpc/\u0026lt;fpc\u0026gt;/pfe/\u0026lt;pfe\u0026gt;/cm/\u0026lt;cm\u0026gt;/Host_Loopback/\u0026lt;cm\u0026gt;/HOST_LOOPBACK_MAKE_CMERROR_ID[\u0026lt;id\u0026gt;])\u003c/code\u003e\u003cbr\u003e\u003cp\u003eThis issue affects Juniper Networks Junos OS:\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions earlier than 20.4R3-S8;\u003c/li\u003e\u003cli\u003e21.1 versions earlier than 21.1R3-S4;\u003c/li\u003e\u003cli\u003e21.2 versions earlier than 21.2R3-S6;\u003c/li\u003e\u003cli\u003e21.3 versions earlier than 21.3R3-S3;\u003c/li\u003e\u003cli\u003e21.4 versions earlier than 21.4R3-S5;\u003c/li\u003e\u003cli\u003e22.1 versions earlier than 22.1R2-S2, 22.1R3;\u003c/li\u003e\u003cli\u003e22.2 versions earlier than 22.2R2-S1, 22.2R3.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\\n\\n\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-76\", \"description\": \"CWE-76 Improper Neutralization of Equivalent Special Elements\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"description\": \"Denial of Service (DoS)\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"To be exposed to this issue FTI need to be configured:\\n\\n  [ interfaces fti0 unit \u003cunit\u003e tunnel ... ]\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eTo be exposed to this issue FTI need to be configured:\u003c/p\u003e\u003ccode\u003e  [ interfaces fti0 unit \u0026lt;unit\u0026gt; tunnel ... ]\u003c/code\u003e\u003cbr/\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"shortName\": \"juniper\", \"dateUpdated\": \"2024-01-12T00:53:38.834Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-21600\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-06-17T21:09:19.373Z\", \"dateReserved\": \"2023-12-27T19:38:25.706Z\", \"assignerOrgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"datePublished\": \"2024-01-12T00:53:38.834Z\", \"assignerShortName\": \"juniper\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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