fkie_nvd - fkie_cve-2025-6188

FKIE_CVE-2025-6188

Vulnerability from fkie_nvd - Published: 2025-08-25 21:15 - Updated: 2025-08-27 15:15

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication.

References

	URL	Tags
	psirt@arista.com	https://www.arista.com/en/support/advisories-notices/security-advisory/22021-security-advisory-0121

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication."
    },
    {
      "lang": "es",
      "value": "En las plataformas afectadas que ejecutan Arista EOS, EOS podr\u00eda aceptar paquetes UDP maliciosos con el puerto de origen 3503. El puerto UDP 3503 est\u00e1 asociado con la respuesta de eco de LspPing. Esto puede provocar comportamientos inesperados, especialmente en servicios basados en UDP que no realizan ning\u00fan tipo de autenticaci\u00f3n."
    }
  ],
  "id": "CVE-2025-6188",
  "lastModified": "2025-08-27T15:15:40.633",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "psirt@arista.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-08-25T21:15:38.500",
  "references": [
    {
      "source": "psirt@arista.com",
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/22021-security-advisory-0121"
    }
  ],
  "sourceIdentifier": "psirt@arista.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2025-6188 (GCVE-0-2025-6188)

Vulnerability from cvelistv5 – Published: 2025-08-25 20:14 – Updated: 2025-08-27 14:53

Summary

Severity ?

7.5 (High)


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

CWE

Assigner

Arista

References

URL

Tags

https://www.arista.com/en/support/advisories-noti…

Impacted products

	Vendor	Product	Version
	Arista Networks	EOS	Affected: 4.33.0 , ≤ 4.33.1F (custom) Affected: 4.33.1.0 , ≤ 4.33.1.2F (custom) Affected: 4.32.4.0 , ≤ 4.32.4.1M (custom) Affected: 4.31.0 , ≤ 4.31.6M (custom) Affected: 4.30.0 , ≤ 4.30.9.1M (custom)

Credits

This issue was discovered externally and responsibly reported to Arista by Chris Laffin of automattic.com.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-6188",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-26T19:56:57.303610Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-290",
                "description": "CWE-290 Authentication Bypass by Spoofing",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-27T14:53:30.181Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "platforms": [
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          "vendor": "Arista Networks",
          "versions": [
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              "lessThanOrEqual": "4.33.1F",
              "status": "affected",
              "version": "4.33.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.33.1.2F",
              "status": "affected",
              "version": "4.33.1.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.32.4.1M",
              "status": "affected",
              "version": "4.32.4.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.31.6M",
              "status": "affected",
              "version": "4.31.0",
              "versionType": "custom"
            },
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              "lessThanOrEqual": "4.30.9.1M",
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              "version": "4.30.0",
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              "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eOn affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication."
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      ],
      "impacts": [
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          "capecId": "CAPEC-486",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-486 UDP Flood"
            }
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
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          "descriptions": [
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              "description": "288",
              "lang": "en"
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      "providerMetadata": {
        "dateUpdated": "2025-08-25T20:14:23.427Z",
        "orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
        "shortName": "Arista"
      },
      "references": [
        {
          "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/22021-security-advisory-0121"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "type": "text/html",
              "value": "\u003cp\u003eThe recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades\"\u003eEOS User Manual: Upgrades and Downgrades\u003c/a\u003e\u003c/p\u003e\u003cdiv\u003eCVE-2025-6188 has been fixed in the following releases:\u003c/div\u003e\u003cul\u003e\u003cli\u003e4.34.0 and later releases in the 4.34.x train\u003c/li\u003e\u003cli\u003e4.33.2 and later releases in the 4.33.x train\u003c/li\u003e\u003cli\u003e4.32.5 and later releases in the 4.32.x train\u003c/li\u003e\u003cli\u003e4.31.7 and later releases in the 4.31.x train\u003c/li\u003e\u003cli\u003e4.30.10 and later releases in the 4.30.x train\u003c/li\u003e\u003c/ul\u003e"
            }
          ],
          "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see  EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades \n\nCVE-2025-6188 has been fixed in the following releases:\n\n  *  4.34.0 and later releases in the 4.34.x train\n  *  4.33.2 and later releases in the 4.33.x train\n  *  4.32.5 and later releases in the 4.32.x train\n  *  4.31.7 and later releases in the 4.31.x train\n  *  4.30.10 and later releases in the 4.30.x train"
        }
      ],
      "source": {
        "advisory": "121",
        "defect": [
          "BUG 1008073"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do n",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eFor EOS versions more recent than 4.28.1, if MPLS is not being used on the EOS device, a custom control plane ACL can be applied to remove the rules that allow traffic with source port 3503.\u003c/p\u003e\u003cpre\u003eSwitch(config)#system control-plane\nSwitch(config-cp)#ip access-group my-custom-acl \n\u003c/pre\u003e\u003cdiv\u003e\u0026nbsp;\u003c/div\u003e\u003cp\u003eFor EOS versions more recent than 4.22.0, an \u2018mpls ping\u2019 service ACL can be applied to restrict traffic coming with source/destination port 3503. This service ACL is applicable on the traffic coming in with source/destination port 3503. MPLS configuration is not required to apply the ACL.\u003c/p\u003e\u003cp\u003eTake the following example, where the user applies service ACL \u2018Foo\u2019 that allows traffic from 10.0.0.0/8 with source port 3503 and denies everything else.\u003c/p\u003e\u003cpre\u003eSwitch(config)#ip access-list Foo\nSwitch(config-acl-foo)#permit udp 10.0.0.0/8 eq lsp-ping any\nSwitch(config-acl-foo)#deny udp any eq lsp-ping any\n \nSwitch(config)#mpls ping\nSwitch(config-mpls-ping)#ip access-group foo in\n\u003c/pre\u003e\u003cdiv\u003e\u0026nbsp;\u003c/div\u003e\u003cp\u003eIf MPLS is not being used, it is fine to only have the deny rule in the ACL. For EOS versions older than 4.22.0 no mitigation exists.\u003c/p\u003e"
            }
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          "value": "For EOS versions more recent than 4.28.1, if MPLS is not being used on the EOS device, a custom control plane ACL can be applied to remove the rules that allow traffic with source port 3503.\n\nSwitch(config)#system control-plane\nSwitch(config-cp)#ip access-group my-custom-acl \n\n\n\u00a0\n\nFor EOS versions more recent than 4.22.0, an \u2018mpls ping\u2019 service ACL can be applied to restrict traffic coming with source/destination port 3503. This service ACL is applicable on the traffic coming in with source/destination port 3503. MPLS configuration is not required to apply the ACL.\n\nTake the following example, where the user applies service ACL \u2018Foo\u2019 that allows traffic from 10.0.0.0/8 with source port 3503 and denies everything else.\n\nSwitch(config)#ip access-list Foo\nSwitch(config-acl-foo)#permit udp 10.0.0.0/8 eq lsp-ping any\nSwitch(config-acl-foo)#deny udp any eq lsp-ping any\n \nSwitch(config)#mpls ping\nSwitch(config-mpls-ping)#ip access-group foo in\n\n\n\u00a0\n\nIf MPLS is not being used, it is fine to only have the deny rule in the ACL. For EOS versions older than 4.22.0 no mitigation exists."
        }
      ],
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  "cveMetadata": {
    "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
    "assignerShortName": "Arista",
    "cveId": "CVE-2025-6188",
    "datePublished": "2025-08-25T20:14:23.427Z",
    "dateReserved": "2025-06-16T20:34:33.402Z",
    "dateUpdated": "2025-08-27T14:53:30.181Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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

FKIE_CVE-2025-6188

CVE-2025-6188 (GCVE-0-2025-6188)

Tags

Sightings

Nomenclature