{
  "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" : "w3m ist ein Text File Viewer und kann auch als Textmodus Web-Browser genutzt werden.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in w3m ausnutzen, um einen Denial of Service Angriff durchzuführen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- UNIX\n- Linux\n- MacOS X",
      "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-2024-0004 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0004.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2024-0004 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-0004"
    }, {
      "category" : "external",
      "summary" : "National Vulnerability Database CVE-2023-4255 vom 2024-01-02",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-4255"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2024:0014-1 vom 2024-01-02",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2024-January/017586.html"
    }, {
      "category" : "external",
      "summary" : "GitHub Security Advisory vom 2024-01-02",
      "url" : "https://github.com/advisories/GHSA-hx3r-ph4g-9px9"
    }, {
      "category" : "external",
      "summary" : "Proof of Concept (PoC)",
      "url" : "https://github.com/tats/w3m/issues/268"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-6580-1 vom 2024-01-15",
      "url" : "https://ubuntu.com/security/notices/USN-6580-1"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2024-3FC66F8BF3 vom 2024-03-19",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2024-3fc66f8bf3"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2024-AEB75F8B5B vom 2024-03-19",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2024-aeb75f8b5b"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-EPEL-2024-BF31852FE0 vom 2024-03-19",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2024-bf31852fe0"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-EPEL-2024-5253D48B14 vom 2024-03-19",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2024-5253d48b14"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-EPEL-2024-0398EBBBFA vom 2024-03-19",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2024-0398ebbbfa"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2024-38C2261CA0 vom 2024-03-19",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2024-38c2261ca0"
    } ],
    "source_lang" : "en-US",
    "title" : "w3m: Schwachstelle ermöglicht Denial of Service",
    "tracking" : {
      "current_release_date" : "2024-03-18T23:00:00.000+00:00",
      "generator" : {
        "date" : "2024-08-15T18:03:14.300+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.3.5"
        }
      },
      "id" : "WID-SEC-W-2024-0004",
      "initial_release_date" : "2024-01-02T23:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2024-01-02T23:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2024-01-15T23:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2024-03-18T23:00:00.000+00:00",
        "number" : "3",
        "summary" : "Neue Updates von Fedora aufgenommen"
      } ],
      "status" : "final",
      "version" : "3"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Fedora Linux",
        "product" : {
          "name" : "Fedora Linux",
          "product_id" : "74185",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:fedoraproject:fedora:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Fedora"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Open Source w3m",
        "product" : {
          "name" : "Open Source w3m",
          "product_id" : "T031846",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:w3m:w3m:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Open Source"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Ubuntu Linux",
        "product" : {
          "name" : "Ubuntu Linux",
          "product_id" : "T000126",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:canonical:ubuntu_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Ubuntu"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2023-4255",
    "notes" : [ {
      "category" : "description",
      "text" : "Es besteht eine Schwachstelle in w3m. Dieser Fehler besteht in der Backspace-Behandlung der checkType()-Funktion in der Datei etc.c aufgrund eines Out-of-bounds-Schreibproblems. Durch die Bereitstellung einer speziell gestalteten HTML-Datei kann ein entfernter, anonymer Angreifer diese Schwachstelle ausnutzen, um einen Denial-of-Service-Zustand zu verursachen. Eine erfolgreiche Ausnutzung erfordert eine Benutzerinteraktion."
    } ],
    "product_status" : {
      "known_affected" : [ "T000126", "T031846", "74185" ]
    },
    "release_date" : "2024-01-02T23:00:00.000+00:00",
    "title" : "CVE-2023-4255"
  } ]
}