vuln-ubuntu/data/osv/usn/USN-5008-1.json

{
  "schema_version": "1.7.0",
  "id": "USN-5008-1",
  "summary": "avahi vulnerabilities",
  "details": "Thomas Kremer discovered that Avahi incorrectly handled termination signals\non the Unix socket. A local attacker could possibly use this issue to cause\nAvahi to hang, resulting in a denial of service. This issue only affected\nUbuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2021-3468)\n\nIt was discovered that Avahi incorrectly handled certain hostnames. A local\nattacker could possibly use this issue to cause Avahi to crash, resulting\nin a denial of service. This issue only affected Ubuntu 20.10 and Ubuntu\n21.04. (CVE-2021-3502)\n",
  "aliases": [],
  "upstream": [
    "UBUNTU-CVE-2021-3468",
    "UBUNTU-CVE-2021-3502"
  ],
  "related": [],
  "published": "2021-07-07T17:19:33Z",
  "modified": "2026-04-22T07:37:00Z",
  "affected": [
    {
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "avahi",
        "purl": "pkg:deb/ubuntu/avahi@0.7-3.1ubuntu1.3?arch=source&distro=bionic"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7-3.1ubuntu1.3"
            }
          ]
        }
      ],
      "versions": [
        "0.6.32-1ubuntu1",
        "0.7-3ubuntu1",
        "0.7-3ubuntu2",
        "0.7-3.1ubuntu1",
        "0.7-3.1ubuntu1.1",
        "0.7-3.1ubuntu1.2"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "avahi-autoipd",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "avahi-daemon",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "avahi-discover",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "avahi-dnsconfd",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "avahi-ui-utils",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "avahi-utils",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "gir1.2-avahi-0.6",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-client3",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-common-data",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-common3",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-compat-libdnssd1",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-core7",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-glib1",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-gobject0",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "libavahi-ui-gtk3-0",
            "binary_version": "0.7-3.1ubuntu1.3"
          },
          {
            "binary_name": "python-avahi",
            "binary_version": "0.7-3.1ubuntu1.3"
          }
        ],
        "availability": "No subscription required"
      },
      "database_specific": {
        "cves_map": {
          "ecosystem": "Ubuntu:18.04:LTS",
          "cves": [
            {
              "id": "CVE-2021-3468",
              "severity": [
                {
                  "type": "CVSS_V3",
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                  "type": "Ubuntu",
                  "score": "medium"
                }
              ]
            }
          ]
        }
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "avahi",
        "purl": "pkg:deb/ubuntu/avahi@0.7-4ubuntu7.1?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7-4ubuntu7.1"
            }
          ]
        }
      ],
      "versions": [
        "0.7-4ubuntu5",
        "0.7-4ubuntu6",
        "0.7-4ubuntu7"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "avahi-autoipd",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "avahi-daemon",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "avahi-discover",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "avahi-dnsconfd",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "avahi-ui-utils",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "avahi-utils",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "gir1.2-avahi-0.6",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-client3",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-common-data",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-common3",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-compat-libdnssd1",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-core7",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-glib1",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-gobject0",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "libavahi-ui-gtk3-0",
            "binary_version": "0.7-4ubuntu7.1"
          },
          {
            "binary_name": "python-avahi",
            "binary_version": "0.7-4ubuntu7.1"
          }
        ],
        "availability": "No subscription required"
      },
      "database_specific": {
        "cves_map": {
          "ecosystem": "Ubuntu:20.04:LTS",
          "cves": [
            {
              "id": "CVE-2021-3468",
              "severity": [
                {
                  "type": "CVSS_V3",
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                  "type": "Ubuntu",
                  "score": "medium"
                }
              ]
            }
          ]
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5008-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3468"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3502"
    }
  ]
}