Vulnerability-Lookup

CVE-2017-20233 (GCVE-0-2017-20233)

Vulnerability from cvelistv5 – Published: 2026-04-03 22:47 – Updated: 2026-05-25 23:40

Title

Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass

Summary

Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.

Severity

5.4 (Medium)


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

5.3 (Medium)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-284 - Improper access control

Assigner

VulnCheck

References

2 references

URL	Tags
https://assets.belden.com/m/11a07596f0bf1018/orig…	vendor-advisory
https://www.vulncheck.com/advisories/hirschmann-h…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
Belden	Hirschmann HiLCOS OpenBAT, BAT450, WLC	Affected: 0 , ≤ 9.10.5126-REL (semver) Affected: 0 , ≤ 9.12.5500-REL (semver)
Belden	Hirschmann HiLCOS BAT867	Affected: 0 , ≤ 9.14.5500-REL (semver) Affected: 0 (semver)

Date Public

2017-05-08 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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              "content": {
                "id": "CVE-2017-20233",
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                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-06T16:50:22.722467Z",
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    ],
    "cna": {
      "affected": [
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          "product": "Hirschmann HiLCOS OpenBAT, BAT450, WLC",
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          "versions": [
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        }
      ],
      "metrics": [
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            "privilegesRequired": "NONE",
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            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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        }
      ],
      "source": {
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      },
      "title": "Hirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass"
    }
  },
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    "dateReserved": "2026-04-03T17:40:03.508Z",
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      "date": "2026-07-27",
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    "vulnrichment": {
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}

FKIE_CVE-2017-20233

Vulnerability from fkie_nvd - Published: 2026-04-03 23:16 - Updated: 2026-07-21 07:10

Severity

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

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-HiLCOS-Layer-2-Firewall-BSECV-2017-03.pdf
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broadcast-traffic-bypass

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Hirschmann HiLCOS OpenBAT, BAT450, WLC",
          "vendor": "Belden",
          "versions": [
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              "lessThanOrEqual": "9.10.5126-REL",
              "status": "affected",
              "version": "0",
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            },
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              "status": "affected",
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            }
          ]
        },
        {
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          "product": "Hirschmann HiLCOS BAT867",
          "vendor": "Belden",
          "versions": [
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              "status": "affected",
              "version": "0",
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            },
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              "version": "0",
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            }
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      ],
      "source": "disclosure@vulncheck.com"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall."
    },
    {
      "lang": "es",
      "value": "Los productos Hirschmann HiLCOS OpenBAT, BAT450, WLC, BAT867 contienen una vulnerabilidad de filtrado del cortafuegos que no filtra correctamente el tr\u00e1fico IPv4 de multidifusi\u00f3n y difusi\u00f3n cuando el filtrado de direcciones IP de gesti\u00f3n est\u00e1 deshabilitado, permitiendo que las reglas de filtro configuradas sean eludidas. Atacantes con acceso a la red pueden inyectar u observar paquetes de multidifusi\u00f3n y difusi\u00f3n que deber\u00edan haber sido bloqueados por el cortafuegos."
    }
  ],
  "id": "CVE-2017-20233",
  "lastModified": "2026-07-21T07:10:00.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
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        "impactScore": 2.5,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
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    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
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          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/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:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
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          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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          "role": "CISA Coordinator",
          "timestamp": "2026-04-06T16:50:22.722467Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-03T23:16:59.763",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-HiLCOS-Layer-2-Firewall-BSECV-2017-03.pdf"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broadcast-traffic-bypass"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-W392-GRJ8-MRRF

Vulnerability from github – Published: 2026-04-04 00:31 – Updated: 2026-04-04 00:31

Details

Severity

5.4 (Medium)


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

5.3 (Medium)


                  
                    CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2017-20233"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-03T23:16:59Z",
    "severity": "MODERATE"
  },
  "details": "Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.",
  "id": "GHSA-w392-grj8-mrrf",
  "modified": "2026-04-04T00:31:26Z",
  "published": "2026-04-04T00:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-20233"
    },
    {
      "type": "WEB",
      "url": "https://assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-HiLCOS-Layer-2-Firewall-BSECV-2017-03.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broadcast-traffic-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/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:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2017-20233 (GCVE-0-2017-20233)

FKIE_CVE-2017-20233

GHSA-W392-GRJ8-MRRF

Tags

Sightings

Nomenclature