FKIE_CVE-2026-34933

Vulnerability from fkie_nvd - Published: 2026-04-03 23:17 - Updated: 2026-07-24 22:10
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4.
References
security-advisories@github.comhttps://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50cPatch
security-advisories@github.comhttps://github.com/avahi/avahi/pull/891Issue Tracking, Patch
security-advisories@github.comhttps://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvcExploit, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/04/11/9Exploit, Mailing List, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvcExploit, Patch, Vendor Advisory
Impacted products
Vendor Product Version
avahi avahi *
avahi avahi 0.9
avahi avahi 0.9
avahi avahi 0.9
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "avahi",
          "vendor": "avahi",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9-rc4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6481267F-934F-4A0C-9B25-59738E798458",
              "versionEndExcluding": "0.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "76971590-AEED-4CB1-B7B7-45EA8FD11524",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:avahi:avahi:0.9:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "83D94AE4-46AC-4955-BB0D-193CF79149A1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:avahi:avahi:0.9:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "42B0E12E-E0CC-47B5-B7D3-9FF12156B68E",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4."
    },
    {
      "lang": "es",
      "value": "Avahi es un sistema que facilita el descubrimiento de servicios en una red local a trav\u00e9s del conjunto de protocolos mDNS/DNS-SD. Antes de la versi\u00f3n 0.9-rc4, cualquier usuario local sin privilegios puede bloquear avahi-daemon al enviar una \u00fanica llamada a m\u00e9todo D-Bus con indicadores de publicaci\u00f3n en conflicto. Este problema ha sido parcheado en la versi\u00f3n 0.9-rc4."
    }
  ],
  "id": "CVE-2026-34933",
  "lastModified": "2026-07-24T22:10:00.140",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34933",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-06T16:09:17.006482Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-03T23:17:05.377",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/avahi/avahi/pull/891"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/04/11/9"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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