WID-SEC-W-2026-0265

Vulnerability from csaf_certbund - Published: 2026-01-29 23:00 - Updated: 2026-02-16 23:00
Summary
expat: Schwachstelle ermöglicht Codeausführung

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
Expat ist ein XML Parser, der in der Programmiersprache-C geschrieben ist.
Angriff
Ein lokaler Angreifer kann eine Schwachstelle in expat ausnutzen, um einen Integer-Überlauf auszulösen, der weitere Angriffe ermöglicht, darunter Codeausführung, Offenlegung von Informationen, Speicherbeschädigung und Denial-of-Service.
Betroffene Betriebssysteme
- Sonstiges - UNIX
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{
  "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": "Expat ist ein XML Parser, der in der Programmiersprache-C geschrieben ist.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle in expat ausnutzen, um einen Integer-\u00dcberlauf auszul\u00f6sen, der weitere Angriffe erm\u00f6glicht, darunter Codeausf\u00fchrung, Offenlegung von Informationen, Speicherbesch\u00e4digung und Denial-of-Service.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\n- UNIX",
        "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-2026-0265 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0265.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0265 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0265"
      },
      {
        "category": "external",
        "summary": "NIST Vulnerability Database vom 2026-01-29",
        "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25210"
      },
      {
        "category": "external",
        "summary": "Commit auf GitHub vom 2026-01-29",
        "url": "https://github.com/libexpat/libexpat/pull/1075/commits/9c2d990389e6abe2e44527eeaa8b39f16fe859c7"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:10144-1 vom 2026-02-05",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/TV4R2W7MS2YULWMW7DBASLADMSNKJ3KD/"
      },
      {
        "category": "external",
        "summary": "Tenable Security Advisory TNS-2026-04 vom 2026-02-05",
        "url": "https://de.tenable.com/security/tns-2026-04"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:0386-1 vom 2026-02-05",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-February/024061.html"
      },
      {
        "category": "external",
        "summary": "OpenBSD 7.7 Errata 020 vom 2026-02-09",
        "url": "https://www.openbsd.org/errata77.html"
      },
      {
        "category": "external",
        "summary": "OpenBSD 7.8 Errata 014 vom 2026-02-09",
        "url": "https://www.openbsd.org/errata78.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8022-1 vom 2026-02-11",
        "url": "https://ubuntu.com/security/notices/USN-8022-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8023-1 vom 2026-02-11",
        "url": "https://ubuntu.com/security/notices/USN-8023-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8022-2 vom 2026-02-16",
        "url": "https://ubuntu.com/security/notices/USN-8022-2"
      }
    ],
    "source_lang": "en-US",
    "title": "expat: Schwachstelle erm\u00f6glicht Codeausf\u00fchrung",
    "tracking": {
      "current_release_date": "2026-02-16T23:00:00.000+00:00",
      "generator": {
        "date": "2026-02-17T09:05:31.020+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0265",
      "initial_release_date": "2026-01-29T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-01-29T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-02-01T23:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-5042"
        },
        {
          "date": "2026-02-05T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von openSUSE, Tenable und SUSE aufgenommen"
        },
        {
          "date": "2026-02-09T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates aufgenommen"
        },
        {
          "date": "2026-02-10T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-02-11T23:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-02-16T23:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        }
      ],
      "status": "final",
      "version": "7"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.7.4",
                "product": {
                  "name": "Open Source expat \u003c2.7.4",
                  "product_id": "T050448"
                }
              },
              {
                "category": "product_version",
                "name": "2.7.4",
                "product": {
                  "name": "Open Source expat 2.7.4",
                  "product_id": "T050448-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:expat:expat:2.7.4"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "expat"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "7.7",
                "product": {
                  "name": "OpenBSD OpenBSD 7.7",
                  "product_id": "T043361",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:openbsd:openbsd:7.7"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "7.8",
                "product": {
                  "name": "OpenBSD OpenBSD 7.8",
                  "product_id": "T049929",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:openbsd:openbsd:7.8"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "OpenBSD"
          }
        ],
        "category": "vendor",
        "name": "OpenBSD"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "SUSE openSUSE",
            "product": {
              "name": "SUSE openSUSE",
              "product_id": "T027843",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:opensuse:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c10.10.2",
                "product": {
                  "name": "Tenable Security Nessus \u003c10.10.2",
                  "product_id": "T050574"
                }
              },
              {
                "category": "product_version",
                "name": "10.10.2",
                "product": {
                  "name": "Tenable Security Nessus 10.10.2",
                  "product_id": "T050574-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:tenable:nessus:10.10.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c10.11.2",
                "product": {
                  "name": "Tenable Security Nessus \u003c10.11.2",
                  "product_id": "T050575"
                }
              },
              {
                "category": "product_version",
                "name": "10.11.2",
                "product": {
                  "name": "Tenable Security Nessus 10.11.2",
                  "product_id": "T050575-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:tenable:nessus:10.11.2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Nessus"
          }
        ],
        "category": "vendor",
        "name": "Tenable Security"
      },
      {
        "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-2026-25210",
      "product_status": {
        "known_affected": [
          "T002207",
          "T049929",
          "T050448",
          "T000126",
          "T027843",
          "T050575",
          "T043361",
          "T050574"
        ]
      },
      "release_date": "2026-01-29T23:00:00.000+00:00",
      "title": "CVE-2026-25210"
    }
  ]
}


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Sightings

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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.