USN-5008-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-5008-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5008-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-5008-1
Upstream
Related
Published
2021-07-07T17:19:33.216064Z
Modified
2025-10-13T04:35:34Z
Summary
avahi vulnerabilities
Details

Thomas Kremer discovered that Avahi incorrectly handled termination signals on the Unix socket. A local attacker could possibly use this issue to cause Avahi to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2021-3468)

It was discovered that Avahi incorrectly handled certain hostnames. A local attacker could possibly use this issue to cause Avahi to crash, resulting in a denial of service. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. (CVE-2021-3502)

References

Affected packages

Ubuntu:18.04:LTS / avahi

Package

Name
avahi
Purl
pkg:deb/ubuntu/avahi@0.7-3.1ubuntu1.3?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.7-3.1ubuntu1.3

Affected versions

0.*

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-client-dev",
            "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-common-dev",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-common3",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-compat-libdnssd-dev",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-compat-libdnssd1",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-core-dev",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-core7",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-glib-dev",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-glib1",
            "binary_version": "0.7-3.1ubuntu1.3"
        },
        {
            "binary_name": "libavahi-gobject-dev",
            "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": "libavahi-ui-gtk3-dev",
            "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": [
        {
            "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"
                }
            ],
            "id": "CVE-2021-3468"
        }
    ]
}

Ubuntu:20.04:LTS / avahi

Package

Name
avahi
Purl
pkg:deb/ubuntu/avahi@0.7-4ubuntu7.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.7-4ubuntu7.1

Affected versions

0.*

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-client-dev",
            "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-common-dev",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-common3",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-compat-libdnssd-dev",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-compat-libdnssd1",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-core-dev",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-core7",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-glib-dev",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-glib1",
            "binary_version": "0.7-4ubuntu7.1"
        },
        {
            "binary_name": "libavahi-gobject-dev",
            "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": "libavahi-ui-gtk3-dev",
            "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": [
        {
            "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"
                }
            ],
            "id": "CVE-2021-3468"
        }
    ]
}