UBUNTU-CVE-2021-3468

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Source
https://ubuntu.com/security/CVE-2021-3468
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3468.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-3468
Upstream
Downstream
Related
Published
2021-06-02T16:15:00Z
Modified
2025-09-08T16:46:43Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.

References

Affected packages

Ubuntu:Pro:14.04:LTS / avahi

Package

Name
avahi
Purl
pkg:deb/ubuntu/avahi@0.6.31-4ubuntu1.3+esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.31-4ubuntu1.3+esm1

Affected versions

0.*

0.6.31-2ubuntu4
0.6.31-2ubuntu5
0.6.31-3ubuntu1
0.6.31-4ubuntu1
0.6.31-4ubuntu1.1
0.6.31-4ubuntu1.2
0.6.31-4ubuntu1.3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "avahi-autoipd",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "avahi-daemon",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "avahi-discover",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "avahi-dnsconfd",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "avahi-ui-utils",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "avahi-utils",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-client-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-client3",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-common-data",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-common-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-common3",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-compat-libdnssd-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-compat-libdnssd1",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-core-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-core7",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-glib-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-glib1",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-gobject-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-gobject0",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-qt4-1",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-qt4-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-ui-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-ui-gtk3-0",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-ui-gtk3-dev",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "libavahi-ui0",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        },
        {
            "binary_name": "python-avahi",
            "binary_version": "0.6.31-4ubuntu1.3+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3468.json"

Ubuntu:Pro:16.04:LTS / avahi

Package

Name
avahi
Purl
pkg:deb/ubuntu/avahi@0.6.32~rc+dfsg-1ubuntu2.3+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.32~rc+dfsg-1ubuntu2.3+esm1

Affected versions

0.*

0.6.31-4ubuntu4
0.6.32~rc+dfsg-1ubuntu2
0.6.32~rc+dfsg-1ubuntu2.1
0.6.32~rc+dfsg-1ubuntu2.2
0.6.32~rc+dfsg-1ubuntu2.3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "avahi-autoipd",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "avahi-daemon",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "avahi-discover",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "avahi-dnsconfd",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "avahi-ui-utils",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "avahi-utils",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-client-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-client3",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-common-data",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-common-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-common3",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-compat-libdnssd-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-compat-libdnssd1",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-core-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-core7",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-glib-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-glib1",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-gobject-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-gobject0",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-qt4-1",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-qt4-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-ui-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-ui-gtk3-0",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-ui-gtk3-dev",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "libavahi-ui0",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        },
        {
            "binary_name": "python-avahi",
            "binary_version": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3468.json"

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 

{
    "availability": "No subscription required",
    "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"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3468.json"

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 

{
    "availability": "No subscription required",
    "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"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3468.json"