usn-5008-2
Vulnerability from osv_ubuntu
Published
2021-07-07 19:17
Modified
2026-06-29 10:52
Summary
avahi vulnerability
Details
USN-5008-1 fixed a vulnerability in avahi. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory 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.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-3468",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:14.04:LTS"
}
},
"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-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-common3",
"binary_version": "0.6.31-4ubuntu1.3+esm1"
},
{
"binary_name": "libavahi-compat-libdnssd1",
"binary_version": "0.6.31-4ubuntu1.3+esm1"
},
{
"binary_name": "libavahi-core7",
"binary_version": "0.6.31-4ubuntu1.3+esm1"
},
{
"binary_name": "libavahi-glib1",
"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-ui-gtk3-0",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "avahi",
"purl": "pkg:deb/ubuntu/avahi@0.6.31-4ubuntu1.3+esm1?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.6.31-4ubuntu1.3+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-3468",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"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-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-common3",
"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-core7",
"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-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-ui-gtk3-0",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "avahi",
"purl": "pkg:deb/ubuntu/avahi@0.6.32~rc+dfsg-1ubuntu2.3+esm1?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.6.32~rc+dfsg-1ubuntu2.3+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
}
],
"aliases": [],
"details": "USN-5008-1 fixed a vulnerability in avahi. This update provides\nthe corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n Thomas Kremer discovered that Avahi incorrectly handled termination signals\n on the Unix socket. A local attacker could possibly use this issue to cause\n Avahi to hang, resulting in a denial of service.\n",
"id": "USN-5008-2",
"modified": "2026-06-29T10:52:50Z",
"published": "2021-07-07T19:17:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5008-2"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3468"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "avahi vulnerability",
"upstream": [
"UBUNTU-CVE-2021-3468"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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