GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

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

Vulnerability from cvelistv5 – Published: 2023-12-19 23:18 – Updated: 2024-08-02 22:16
VLAI
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
References
Impacted products
Vendor Product Version CPE status
EFACEC BCU 500 Affected: version 4.07
guessed Create a notification for this product.
Credits
Aarón Flecha Menéndez of S21sec
Show details on NVD website
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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-50707",
      "date": "2026-09-19",
      "epss": "0.00699",
      "percentile": "0.51659"
    },
    "fkie_nvd": {
      "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"
        }
      ],
      "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": "2024-11-21T08:37:10.680",
      "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"
        }
      ]
    },
    "nvd": {
      "cve": {
        "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"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.