Vulnerability-Lookup

FKIE_CVE-2023-50707

Vulnerability from fkie_nvd - Published: 2023-12-20 00:15 - Updated: 2026-06-17 06:39

Severity

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

Summary

Through the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.

References

	URL	Tags
	ics-cert@hq.dhs.gov	https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02	Third Party Advisory, US Government Resource
	af854a3a-2127-422b-91ae-364da2661108	https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02	Third Party Advisory, US Government Resource

Impacted products

	Vendor	Product	Version
	efacec	bcu_500_firmware	4.07
	efacec	bcu_500	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "BCU 500",
          "vendor": "EFACEC",
          "versions": [
            {
              "status": "affected",
              "version": "version 4.07"
            }
          ]
        }
      ],
      "source": "ics-cert@hq.dhs.gov"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:efacec:bcu_500_firmware:4.07:*:*:*:*:*:*:*",
              "matchCriteriaId": "62E65B01-DC85-484D-8133-D2CEF60C1D67",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:efacec:bcu_500:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "B98DBC89-789C-4C56-B8B3-72675FDA9CE1",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "\nThrough the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.\n\n\n\n\n"
    },
    {
      "lang": "es",
      "value": "Mediante la explotaci\u00f3n de sesiones de usuarios activos, un atacante podr\u00eda enviar solicitudes personalizadas para provocar una condici\u00f3n de denegaci\u00f3n de servicio en el dispositivo."
    }
  ],
  "id": "CVE-2023-50707",
  "lastModified": "2026-06-17T06:39:49.410",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8,
        "source": "ics-cert@hq.dhs.gov",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-12-20T00:15:09.643",
  "references": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02"
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "ics-cert@hq.dhs.gov",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2023-50707 (GCVE-0-2023-50707)

Vulnerability from cvelistv5 – Published: 2023-12-19 23:18 – Updated: 2024-08-02 22:16

Title

Uncontrolled Resource Consumption in EFACEC BCU 500

Summary

Through the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.

Severity

9.6 (Critical)


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

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

icscert icscert root

References

1 reference

URL	Tags
https://www.cisa.gov/news-events/ics-advisories/i…	government-resource

Impacted products

1 product

Vendor	Product	Version
EFACEC	BCU 500	Affected: version 4.07

Credits

Aarón Flecha Menéndez of S21sec

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T22:16:47.195Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "government-resource",
              "x_transferred"
            ],
            "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "BCU 500",
          "vendor": "EFACEC",
          "versions": [
            {
              "status": "affected",
              "version": "version 4.07"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Aar\u00f3n Flecha Men\u00e9ndez of S21sec "
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\n\n\u003cp\u003eThrough the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.\u003c/p\u003e\u003cbr\u003e\n\n"
            }
          ],
          "value": "\nThrough the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.\n\n\n\n\n"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400 Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-19T23:18:26.771Z",
        "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
        "shortName": "icscert"
      },
      "references": [
        {
          "tags": [
            "government-resource"
          ],
          "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\n\n\u003cp\u003eEFACEC released BCU 500 versions 4.08 to mitigate this vulnerability.\u003c/p\u003e\u003cp\u003eFor more information, contact \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://www.efacec.pt/en/contacts/\"\u003eEFACEC support\u003c/a\u003e.\u003c/p\u003e\n\n\u003cbr\u003e"
            }
          ],
          "value": "\nEFACEC released BCU 500 versions 4.08 to mitigate this vulnerability.\n\nFor more information, contact  EFACEC support https://www.efacec.pt/en/contacts/ .\n\n\n\n\n"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Uncontrolled Resource Consumption in EFACEC BCU 500",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
    "assignerShortName": "icscert",
    "cveId": "CVE-2023-50707",
    "datePublished": "2023-12-19T23:18:26.771Z",
    "dateReserved": "2023-12-11T16:37:13.794Z",
    "dateUpdated": "2024-08-02T22:16:47.195Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.