github - ghsa-3r4r-ffrp-777w

ghsa-3r4r-ffrp-777w

Vulnerability from github

Published

2024-01-12 03:30

Modified

2024-01-12 03:30

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

An Improper Handling of Exceptional Conditions vulnerability in BGP session processing of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker, using specific timing outside the attacker's control, to flap BGP sessions and cause the routing protocol daemon (rpd) process to crash and restart, leading to a Denial of Service (DoS) condition. Continued BGP session flapping will create a sustained Denial of Service (DoS) condition.

This issue only affects routers configured with non-stop routing (NSR) enabled. Graceful Restart (GR) helper mode, enabled by default, is also required for this issue to be exploitable.

When the BGP session flaps on the NSR-enabled router, the device enters GR-helper/LLGR-helper mode due to the peer having negotiated GR/LLGR-restarter capability and the backup BGP requests for replication of the GR/LLGR-helper session, master BGP schedules, and initiates replication of GR/LLGR stale routes to the backup BGP. In this state, if the BGP session with the BGP peer comes up again, unsolicited replication is initiated for the peer without cleaning up the ongoing GR/LLGR-helper mode replication. This parallel two instances of replication for the same peer leads to the assert if the BGP session flaps again.

This issue affects:

Juniper Networks Junos OS

All versions earlier than 20.4R3-S9;
21.2 versions earlier than 21.2R3-S7;
21.3 versions earlier than 21.3R3-S5;
21.4 versions earlier than 21.4R3-S5;
22.1 versions earlier than 22.1R3-S4;
22.2 versions earlier than 22.2R3-S3;
22.3 versions earlier than 22.3R3-S1;
22.4 versions earlier than 22.4R2-S2, 22.4R3;
23.2 versions earlier than 23.2R1-S1, 23.2R2.

Juniper Networks Junos OS Evolved

All versions earlier than 21.3R3-S5-EVO;
21.4 versions earlier than 21.4R3-S5-EVO;
22.1 versions earlier than 22.1R3-S4-EVO;
22.2 versions earlier than 22.2R3-S3-EVO;
22.3 versions earlier than 22.3R3-S1-EVO;
22.4 versions earlier than 22.4R2-S2-EVO, 22.4R3-EVO;
23.2 versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2024-21585"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-755"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-01-12T01:15:46Z",
    "severity": "MODERATE"
  },
  "details": "\nAn Improper Handling of Exceptional Conditions vulnerability in BGP session processing of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker, using specific timing outside the attacker\u0027s control, to flap BGP sessions and cause the routing protocol daemon (rpd) process to crash and restart, leading to a Denial of Service (DoS) condition. Continued BGP session flapping will create a sustained Denial of Service (DoS) condition.\n\nThis issue only affects routers configured with non-stop routing (NSR) enabled. Graceful Restart (GR) helper mode, enabled by default, is also required for this issue to be exploitable.\n\nWhen the BGP session flaps on the NSR-enabled router, the device enters GR-helper/LLGR-helper mode due to the peer having negotiated GR/LLGR-restarter capability and the backup BGP requests for replication of the GR/LLGR-helper session, master BGP schedules, and initiates replication of GR/LLGR stale routes to the backup BGP. In this state, if the BGP session with the BGP peer comes up again, unsolicited replication is initiated for the peer without cleaning up the ongoing GR/LLGR-helper mode replication. This parallel two instances of replication for the same peer leads to the assert if the BGP session flaps again.\n\nThis issue affects:\n\nJuniper Networks Junos OS\n\n\n\n  *  All versions earlier than 20.4R3-S9;\n  *  21.2 versions earlier than 21.2R3-S7;\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\nJuniper Networks Junos OS Evolved\n\n\n\n  *  All versions earlier than 21.3R3-S5-EVO;\n  *  21.4 versions earlier than 21.4R3-S5-EVO;\n  *  22.1 versions earlier than 22.1R3-S4-EVO;\n  *  22.2 versions earlier than 22.2R3-S3-EVO;\n  *  22.3 versions earlier than 22.3R3-S1-EVO;\n  *  22.4 versions earlier than 22.4R2-S2-EVO, 22.4R3-EVO;\n  *  23.2 versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.\n\n\n\n\n\n\n",
  "id": "GHSA-3r4r-ffrp-777w",
  "modified": "2024-01-12T03:30:48Z",
  "published": "2024-01-12T03:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21585"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.juniper.net/JSA75723"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.juniper.net/s/article/MX-GR-and-LLGR-capability-and-compatibility-changes-after-15-1-release"
    },
    {
      "type": "WEB",
      "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2024-21585

Vulnerability from cvelistv5

Published

2024-01-12 00:50

Modified

2024-11-14 14:40

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

Junos OS and Junos OS Evolved: BGP session flaps on NSR-enabled devices can cause rpd crash

References

▼	URL	Tags
	https://supportportal.juniper.net/JSA75723	vendor-advisory
	https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L	technical-description
	https://supportportal.juniper.net/s/article/MX-GR-and-LLGR-capability-and-compatibility-changes-after-15-1-release	product

Impacted products

▼	Vendor	Product
	Juniper Networks	Junos OS
	Juniper Networks	Junos OS Evolved

Show details on NVD website

JSON

To clipboard

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              "value": "Non-stop routing (NSR) is enabled using the following configuration:\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e\u0026nbsp; [edit chassis redundancy]\u003cbr\u003e\u0026nbsp; graceful-switchover;\u003cbr\u003e\u0026nbsp; \u003cbr\u003e\u0026nbsp; [edit routing-options]\u003cbr\u003e\u0026nbsp; nonstop-routing;\u003c/tt\u003e\u003cbr\u003e"
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              "value": "\n\n\u003cp\u003eAn Improper Handling of Exceptional Conditions vulnerability in BGP session processing of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker, using specific timing outside the attacker\u0027s control, to flap BGP sessions and cause the routing protocol daemon (rpd) process to crash and restart, leading to a Denial of Service (DoS) condition. Continued BGP session flapping will create a sustained Denial of Service (DoS) condition.\u003c/p\u003e\u003cp\u003eThis issue only affects routers configured with non-stop routing (NSR) enabled. Graceful Restart (GR) helper mode, enabled by default, is also required for this issue to be exploitable.\u003cbr\u003e\u003c/p\u003eNote: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.\u003cbr\u003e\u003cp\u003eWhen the BGP session flaps on the NSR-enabled router, the device enters GR-helper/LLGR-helper mode due to the peer having negotiated GR/LLGR-restarter capability and the backup BGP requests for replication of the GR/LLGR-helper session, master BGP schedules, and initiates replication of GR/LLGR stale routes to the backup BGP. In this state, if the BGP session with the BGP peer comes up again, unsolicited replication is initiated for the peer without cleaning up the ongoing GR/LLGR-helper mode replication. This parallel two instances of replication for the same peer leads to the assert if the BGP session flaps again.\u003c/p\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 earlier than 20.4R3-S9;\u003c/li\u003e\u003cli\u003e21.2 versions earlier than 21.2R3-S7;\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\u003cp\u003eJuniper Networks Junos OS Evolved\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions earlier than 21.3R3-S5-EVO;\u003c/li\u003e\u003cli\u003e21.4 versions earlier than 21.4R3-S5-EVO;\u003c/li\u003e\u003cli\u003e22.1 versions earlier than 22.1R3-S4-EVO;\u003c/li\u003e\u003cli\u003e22.2 versions earlier than 22.2R3-S3-EVO;\u003c/li\u003e\u003cli\u003e22.3 versions earlier than 22.3R3-S1-EVO;\u003c/li\u003e\u003cli\u003e22.4 versions earlier than 22.4R2-S2-EVO, 22.4R3-EVO;\u003c/li\u003e\u003cli\u003e23.2 versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\n"
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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-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S1, 22.4R2-S2, 22.4R3, 23.1R2, 23.2R1-S1, 23.2R2, 23.3R1, and all subsequent releases.\u003c/p\u003e\u003cp\u003eJunos OS Evolved: 21.3R3-S5-EVO, 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S3-EVO, 22.3R3-S1-EVO, 22.4R2-S2-EVO, 22.4R3-EVO, 23.1R2-EVO, 23.2R1-S1-EVO, 23.2R2-EVO, 23.3R1-EVO, and all subsequent releases.\u003c/p\u003e"
            }
          ],
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        }
      ],
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        ],
        "discovery": "USER"
      },
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          "time": "2024-01-10T17:00:00.000Z",
          "value": "Initial Publication"
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          "lang": "en",
          "time": "2024-01-16T17:00:00.000Z",
          "value": "Clarified that SRX Series, which does not support NSR, is not vulnerable"
        },
        {
          "lang": "en",
          "time": "2024-01-30T17:00:00.000Z",
          "value": "Updated required config and workaround to be more precise"
        }
      ],
      "title": "Junos OS and Junos OS Evolved: BGP session flaps on NSR-enabled devices can cause rpd crash",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Graceful Restart (GR) helper mode and Long-Lived Graceful Restart (LLGR) helper mode can be disabled to prevent this issue.\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e\u0026nbsp; [edit protocols bgp graceful-restart]\u003cbr\u003e\u0026nbsp; disable;\u003cbr\u003e\u003cbr\u003e\u0026nbsp; [edit protocols bgp graceful-restart long-lived receiver]\u003cbr\u003e\u0026nbsp; disable;\u003c/tt\u003e"
            }
          ],
          "value": "Graceful Restart (GR) helper mode and Long-Lived Graceful Restart (LLGR) helper mode can be disabled to prevent this issue.\n\n\u00a0 [edit protocols bgp graceful-restart]\n\u00a0 disable;\n\n\u00a0 [edit protocols bgp graceful-restart long-lived receiver]\n\u00a0 disable;"
        }
      ],
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        "engine": "Vulnogram 0.1.0-av217"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2024-21585",
    "datePublished": "2024-01-12T00:50:59.105Z",
    "dateReserved": "2023-12-27T19:38:25.702Z",
    "dateUpdated": "2024-11-14T14:40:50.210Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
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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