{
  "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 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."
    }, {
      "category" : "description",
      "text" : "Nextcloud ist eine \"on-premise\" Plattform für Dateifreigabe und Zusammenarbeit.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein lokaler Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um Dateien zu manipulieren.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- Android\n- iPhoneOS\n- Linux\n- UNIX\n- Windows",
      "title" : "Betroffene Betriebssysteme"
    } ],
    "publisher" : {
      "category" : "other",
      "contact_details" : "csaf-provider@cert-bund.de",
      "name" : "Bundesamt für Sicherheit in der Informationstechnik",
      "namespace" : "https://www.bsi.bund.de"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "WID-SEC-W-2023-0847 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-0847.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2023-0847 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-0847"
    }, {
      "category" : "external",
      "summary" : "Github Nextcloud Advisory vom 2023-04-04",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc"
    }, {
      "category" : "external",
      "summary" : "Github Nextcloud Advisory vom 2023-04-04",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8"
    }, {
      "category" : "external",
      "summary" : "Github Nextcloud Advisory vom 2023-04-04",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr"
    }, {
      "category" : "external",
      "summary" : "Debian Security Advisory DLA-4303 vom 2025-09-18",
      "url" : "https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html"
    } ],
    "source_lang" : "en-US",
    "title" : "Nextcloud: Mehrere Schwachstellen ermöglichen Manipulation von Dateien",
    "tracking" : {
      "current_release_date" : "2025-09-17T22:00:00.000+00:00",
      "generator" : {
        "date" : "2025-09-18T07:16:15.869+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.4.0"
        }
      },
      "id" : "WID-SEC-W-2023-0847",
      "initial_release_date" : "2023-04-04T22:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2023-04-04T22:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2025-09-17T22:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von Debian aufgenommen"
      } ],
      "status" : "final",
      "version" : "2"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Debian Linux",
        "product" : {
          "name" : "Debian Linux",
          "product_id" : "2951",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:debian:debian_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Debian"
    }, {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_version_range",
          "name" : "<3.6.5 Desktop",
          "product" : {
            "name" : "Nextcloud Nextcloud <3.6.5 Desktop",
            "product_id" : "T027074"
          }
        }, {
          "category" : "product_version",
          "name" : "3.6.5 Desktop",
          "product" : {
            "name" : "Nextcloud Nextcloud 3.6.5 Desktop",
            "product_id" : "T027074-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:3.6.5_desktop"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "<3.8.0 Desktop",
          "product" : {
            "name" : "Nextcloud Nextcloud <3.8.0 Desktop",
            "product_id" : "T027076"
          }
        }, {
          "category" : "product_version",
          "name" : "3.8.0 Desktop",
          "product" : {
            "name" : "Nextcloud Nextcloud 3.8.0 Desktop",
            "product_id" : "T027076-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:3.8.0_desktop"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "<3.25.0 Android",
          "product" : {
            "name" : "Nextcloud Nextcloud <3.25.0 Android",
            "product_id" : "T027077"
          }
        }, {
          "category" : "product_version",
          "name" : "3.25.0 Android",
          "product" : {
            "name" : "Nextcloud Nextcloud 3.25.0 Android",
            "product_id" : "T027077-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:3.25.0_android"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "<4.8.0 iOS",
          "product" : {
            "name" : "Nextcloud Nextcloud <4.8.0 iOS",
            "product_id" : "T027079"
          }
        }, {
          "category" : "product_version",
          "name" : "4.8.0 iOS",
          "product" : {
            "name" : "Nextcloud Nextcloud 4.8.0 iOS",
            "product_id" : "T027079-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:4.8.0_ios"
            }
          }
        } ],
        "category" : "product_name",
        "name" : "Nextcloud"
      } ],
      "category" : "vendor",
      "name" : "Nextcloud"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2023-28997",
    "product_status" : {
      "known_affected" : [ "T027074", "2951" ]
    },
    "release_date" : "2023-04-04T22:00:00.000+00:00",
    "title" : "CVE-2023-28997"
  }, {
    "cve" : "CVE-2023-28998",
    "product_status" : {
      "known_affected" : [ "T027074", "2951" ]
    },
    "release_date" : "2023-04-04T22:00:00.000+00:00",
    "title" : "CVE-2023-28998"
  }, {
    "cve" : "CVE-2023-28999",
    "product_status" : {
      "known_affected" : [ "T027076", "T027077", "2951", "T027079" ]
    },
    "release_date" : "2023-04-04T22:00:00.000+00:00",
    "title" : "CVE-2023-28999"
  } ]
}