WID-SEC-W-2026-0975

Vulnerability from csaf_certbund - Published: 2026-04-06 22:00 - Updated: 2026-06-09 22:00
Summary
avahi: Schwachstelle ermöglicht Denial of Service
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: Avahi ist die Implementierung einer Technik zur Vernetzung von Geräten in einem lokalen Netzwerk, ohne dass diese manuell konfiguriert werden müssen.
Angriff: Ein lokaler Angreifer kann eine Schwachstelle in avahi ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2026-34933
Affected products
Product Identifier Version Remediation
SUSE Linux
SUSE
 cpe:/o:suse:suse_linux:- —
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
SUSE openSUSE
SUSE
 cpe:/o:suse:opensuse:- —
Open Source avahi <0.9-rc4
Open Source / avahi
 <0.9-rc4
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
References
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": "Avahi ist die Implementierung einer Technik zur Vernetzung von Ger\u00e4ten in einem lokalen Netzwerk, ohne dass diese manuell konfiguriert werden m\u00fcssen.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle in avahi ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\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-2026-0975 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0975.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0975 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0975"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-w65r-6gxh-vhvc vom 2026-04-06",
        "url": "https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc"
      },
      {
        "category": "external",
        "summary": "Microsoft Security Update Guide vom 2026-04-14",
        "url": "https://msrc.microsoft.com/update-guide/"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:11316 vom 2026-04-28",
        "url": "https://access.redhat.com/errata/RHSA-2026:11316"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21417-1 vom 2026-04-30",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025774.html"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:10670-1 vom 2026-05-05",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/LK4OWC4GTD6XELDD5SALQ5NAKJF2JEJ3/"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8269-1 vom 2026-05-14",
        "url": "https://ubuntu.com/security/notices/USN-8269-1"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21631-1 vom 2026-05-15",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026061.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:2297-1 vom 2026-06-08",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-June/026607.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:2296-1 vom 2026-06-08",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-June/026608.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:2311-1 vom 2026-06-09",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-June/026650.html"
      }
    ],
    "source_lang": "en-US",
    "title": "avahi: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2026-06-09T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-10T07:41:04.680+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-0975",
      "initial_release_date": "2026-04-06T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-06T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-04-14T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates aufgenommen"
        },
        {
          "date": "2026-04-27T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-05-03T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-05-05T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von openSUSE aufgenommen"
        },
        {
          "date": "2026-05-14T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-05-17T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-06-08T22:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-06-09T22:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "9"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "azl3",
                "product": {
                  "name": "Microsoft Azure Linux azl3",
                  "product_id": "T049210",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:microsoft:azure_linux:azl3"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c0.9-rc4",
                "product": {
                  "name": "Open Source avahi \u003c0.9-rc4",
                  "product_id": "T052423"
                }
              },
              {
                "category": "product_version",
                "name": "0.9-rc4",
                "product": {
                  "name": "Open Source avahi 0.9-rc4",
                  "product_id": "T052423-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:avahi:avahi:0.9-rc4"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "avahi"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "67646",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      },
      {
        "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": [
          {
            "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-2026-34933",
      "product_status": {
        "known_affected": [
          "T002207",
          "67646",
          "T000126",
          "T027843",
          "T052423",
          "T049210"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-34933"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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