Vulnerability-Lookup

GHSA-3RPC-J6FW-646R

Vulnerability from github – Published: 2026-04-10 00:30 – Updated: 2026-04-10 00:30

Details

An attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS:

25.2 versions before 25.2R2

This issue doesn't not affected Junos OS versions before 25.2R1.

This issue affects Junos OS Evolved: * 25.2-EVO versions before 25.2R2-EVO

This issue doesn't not affected Junos OS Evolved versions before 25.2R1-EVO.

eBGP and iBGP are affected. IPv4 and IPv6 are affected.

Severity ?

7.4 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

7.1 (High)


                  
                    CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Green

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-33797"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-09T22:16:29Z",
    "severity": "HIGH"
  },
  "details": "An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that session causing a Denial of Service (DoS).\n\nAn attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS:\n\n  *  25.2 versions before 25.2R2\n\n\nThis issue doesn\u0027t not affected Junos OS versions before 25.2R1.\n\nThis issue affects Junos OS Evolved: \n  *  25.2-EVO versions before 25.2R2-EVO\n\n\nThis issue doesn\u0027t not affected Junos OS Evolved versions before 25.2R1-EVO.\n\neBGP and iBGP are affected.\nIPv4 and IPv6 are affected.",
  "id": "GHSA-3rpc-j6fw-646r",
  "modified": "2026-04-10T00:30:29Z",
  "published": "2026-04-10T00:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33797"
    },
    {
      "type": "WEB",
      "url": "https://kb.juniper.net/JSA107850"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:Green",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-33797 (GCVE-0-2026-33797)

Vulnerability from cvelistv5 – Published: 2026-04-09 21:31 – Updated: 2026-04-09 21:31

Title

Junos OS and Junos OS Evolved: An attacker sending a specific genuine BGP packet causes a BGP reset

Summary

An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that session causing a Denial of Service (DoS). An attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS: * 25.2 versions before 25.2R2 This issue doesn't not affected Junos OS versions before 25.2R1. This issue affects Junos OS Evolved: * 25.2-EVO versions before 25.2R2-EVO This issue doesn't not affected Junos OS Evolved versions before 25.2R1-EVO. eBGP and iBGP are affected. IPv4 and IPv6 are affected.

Severity ?

7.4 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

7.1 (High)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Green

CWE

CWE-20 - Improper Input Validation

Assigner

juniper

References

URL

Tags

https://kb.juniper.net/JSA107850

vendor-advisory

Impacted products

Vendor

Product

Version

Juniper Networks

Junos OS

Affected: 25.2 , < 25.2R2 (semver)
Unaffected: 0 , < 25.2R1 (semver)

Juniper Networks

Junos OS Evolved

Affected: 25.2 , < 25.2R2-EVO (semver)
Unaffected: 0 , < 25.2R1-EVO (semver)

Date Public ?

2026-04-08 16:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Junos OS",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "25.2R2",
              "status": "affected",
              "version": "25.2",
              "versionType": "semver"
            },
            {
              "lessThan": "25.2R1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "modules": [
            "bgp"
          ],
          "product": "Junos OS Evolved",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "25.2R2-EVO",
              "status": "affected",
              "version": "25.2",
              "versionType": "semver"
            },
            {
              "lessThan": "25.2R1-EVO",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003ctt\u003e\u0026nbsp; [ protocols bgp group \u0026lt;group\u0026gt; neighbor ]\u003c/tt\u003e\u003cbr\u003e"
            }
          ],
          "value": "[ protocols bgp group \u003cgroup\u003e neighbor ]"
        }
      ],
      "datePublic": "2026-04-08T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that session causing a Denial of Service (DoS).\u003cbr\u003e\u003cbr\u003eAn attacker repeatedly sending the packet will sustain the Denial of Service (DoS).\u003cp\u003eThis issue affects Junos OS:\u003c/p\u003e\u003cul\u003e\u003cli\u003e25.2 versions before 25.2R2\u003c/li\u003e\u003c/ul\u003eThis issue doesn\u0027t not affected Junos OS versions before 25.2R1.\u003cbr\u003e\u003cbr\u003eThis issue affects Junos OS Evolved: \u003cbr\u003e\u003cul\u003e\u003cli\u003e25.2-EVO versions before 25.2R2-EVO\u003c/li\u003e\u003c/ul\u003eThis issue doesn\u0027t not affected Junos OS Evolved versions before 25.2R1-EVO.\u003cbr\u003e\u003cbr\u003eeBGP and iBGP are affected.\u003cbr\u003eIPv4 and IPv6 are affected.\u0026nbsp;\u003cbr\u003e"
            }
          ],
          "value": "An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that session causing a Denial of Service (DoS).\n\nAn attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS:\n\n  *  25.2 versions before 25.2R2\n\n\nThis issue doesn\u0027t not affected Junos OS versions before 25.2R1.\n\nThis issue affects Junos OS Evolved: \n  *  25.2-EVO versions before 25.2R2-EVO\n\n\nThis issue doesn\u0027t not affected Junos OS Evolved versions before 25.2R1-EVO.\n\neBGP and iBGP are affected.\nIPv4 and IPv6 are affected."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
            }
          ],
          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "Automatable": "YES",
            "Recovery": "AUTOMATIC",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "providerUrgency": "GREEN",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "CONCENTRATED",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Green",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "MODERATE"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-09T21:31:22.902Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.juniper.net/JSA107850"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "The following software releases have been updated to resolve this specific issue:\u003cbr\u003eJunos OS:\u0026nbsp;25.2R2,\u0026nbsp;25.4R1, and all subsequent releases.\u003cbr\u003eJunos OS Evolved: 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."
            }
          ],
          "value": "The following software releases have been updated to resolve this specific issue:\nJunos OS:\u00a025.2R2,\u00a025.4R1, and all subsequent releases.\nJunos OS Evolved: 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA107850",
        "defect": [
          "1893316"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Junos OS and Junos OS Evolved: An attacker sending a specific genuine BGP packet causes a BGP reset",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "There are no known workarounds for this issue.\u003cbr\u003e"
            }
          ],
          "value": "There are no known workarounds for this issue."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2026-33797",
    "datePublished": "2026-04-09T21:31:22.902Z",
    "dateReserved": "2026-03-23T19:46:13.673Z",
    "dateUpdated": "2026-04-09T21:31:22.902Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-3RPC-J6FW-646R

CVE-2026-33797 (GCVE-0-2026-33797)

Tags

Sightings

Nomenclature