Vulnerability-Lookup

WID-SEC-W-2023-2642

Vulnerability from csaf_certbund - Published: 2023-10-15 22:00 - Updated: 2023-10-15 22:00

Summary

Nextcloud: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Nextcloud ist eine "on-premise" Plattform für Dateifreigabe und Zusammenarbeit.

Angriff: Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Nextcloud ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

Betroffene Betriebssysteme: - UNIX - Linux

CVE-2023-39960

In Nextcloud existiert eine Schwachstelle in der WebDAV-API. Es fehlt ein Schutz, so dass ein Angreifer Brute-Force-Angriffe auf Passwörter durchführen kann.

References

3 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://github.com/nextcloud/security-advisories/…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Nextcloud ist eine \"on-premise\" Plattform f\u00fcr Dateifreigabe und Zusammenarbeit.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Nextcloud ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- UNIX\n- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2023-2642 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-2642.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-2642 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-2642"
      },
      {
        "category": "external",
        "summary": "Nextcloud Security Advisory vom 2023-10-13",
        "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9"
      }
    ],
    "source_lang": "en-US",
    "title": "Nextcloud: Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
      "current_release_date": "2023-10-15T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:59:51.019+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2023-2642",
      "initial_release_date": "2023-10-15T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-10-15T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Nextcloud Nextcloud Server \u003c 26.0.4",
                "product": {
                  "name": "Nextcloud Nextcloud Server \u003c 26.0.4",
                  "product_id": "T030493",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nextcloud:nextcloud:server__26.0.4"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Nextcloud Nextcloud Server \u003c 25.0.9",
                "product": {
                  "name": "Nextcloud Nextcloud Server \u003c 25.0.9",
                  "product_id": "T030494",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nextcloud:nextcloud:server__25.0.9"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Nextcloud Nextcloud Server \u003c 24.0.12.5",
                "product": {
                  "name": "Nextcloud Nextcloud Server \u003c 24.0.12.5",
                  "product_id": "T030495",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nextcloud:nextcloud:server__24.0.12.5"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Nextcloud Nextcloud Server \u003c 23.0.12.9",
                "product": {
                  "name": "Nextcloud Nextcloud Server \u003c 23.0.12.9",
                  "product_id": "T030496",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nextcloud:nextcloud:server__23.0.12.9"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Nextcloud Nextcloud Server \u003c 22.2.10.14",
                "product": {
                  "name": "Nextcloud Nextcloud Server \u003c 22.2.10.14",
                  "product_id": "T030497",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nextcloud:nextcloud:server__22.2.10.14"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Nextcloud"
          }
        ],
        "category": "vendor",
        "name": "Nextcloud"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-39960",
      "notes": [
        {
          "category": "description",
          "text": "In Nextcloud existiert eine Schwachstelle in der WebDAV-API. Es fehlt ein Schutz, so dass ein Angreifer Brute-Force-Angriffe auf Passw\u00f6rter durchf\u00fchren kann."
        }
      ],
      "release_date": "2023-10-15T22:00:00.000+00:00",
      "title": "CVE-2023-39960"
    }
  ]
}

CVE-2023-39960 (GCVE-0-2023-39960)

Vulnerability from cvelistv5 – Published: 2023-10-13 12:07 – Updated: 2024-09-17 20:32

Title

Nextcloud Server has improper restriction of excessive authentication attempts on WebDAV endpoint

Summary

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server starting with 25.0.0 and prior to 25.09 and 26.04; as well as Nextcloud Enterprise Server starting with 22.0.0 and prior to 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, and 26.0.4; missing protection allows an attacker to brute force passwords on the WebDAV API. Nextcloud Server 25.0.9 and 26.0.4 and Nextcloud Enterprise Server 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, and 26.0.4 contain patches for this issue. No known workarounds are available.

Severity

5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-17 20:31 UTC

CWE

CWE-307 - Improper Restriction of Excessive Authentication Attempts

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7628 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/nextcloud/security-advisories/…	x_refsource_CONFIRM
https://github.com/nextcloud/server/pull/38046	x_refsource_MISC
https://hackerone.com/reports/1924212	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nextcloud	security-advisories	Affected: >= 22.0.0, < 22.2.10.14 Affected: >= 23.0.0, < 23.0.12.9 Affected: >= 24.0.0, < 24.0.12.5 Affected: >= 25.0.0, < 25.0.9 Affected: >= 26.0.0, < 26.0.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T18:18:10.121Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9"
          },
          {
            "name": "https://github.com/nextcloud/server/pull/38046",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/server/pull/38046"
          },
          {
            "name": "https://hackerone.com/reports/1924212",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1924212"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-39960",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-17T20:31:46.041277Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-17T20:32:00.464Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 22.0.0, \u003c 22.2.10.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 23.0.0, \u003c 23.0.12.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 24.0.0, \u003c 24.0.12.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 25.0.0, \u003c 25.0.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 26.0.0, \u003c 26.0.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server starting with 25.0.0 and prior to 25.09 and 26.04; as well as Nextcloud Enterprise Server starting with 22.0.0 and prior to 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, and 26.0.4; missing protection allows an attacker to brute force passwords on the WebDAV API. Nextcloud Server 25.0.9 and 26.0.4 and Nextcloud Enterprise Server 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, and 26.0.4 contain patches for this issue. No known workarounds are available."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-307",
              "description": "CWE-307: Improper Restriction of Excessive Authentication Attempts",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-13T12:07:59.934Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2hrc-5fgp-c9c9"
        },
        {
          "name": "https://github.com/nextcloud/server/pull/38046",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/server/pull/38046"
        },
        {
          "name": "https://hackerone.com/reports/1924212",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1924212"
        }
      ],
      "source": {
        "advisory": "GHSA-2hrc-5fgp-c9c9",
        "discovery": "UNKNOWN"
      },
      "title": "Nextcloud Server has improper restriction of excessive authentication attempts on WebDAV endpoint"
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  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-39960",
    "datePublished": "2023-10-13T12:07:59.934Z",
    "dateReserved": "2023-08-07T16:27:27.076Z",
    "dateUpdated": "2024-09-17T20:32:00.464Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.
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