usn-5008-1
Vulnerability from osv_ubuntu
Published
2021-07-07 17:19
Modified
2026-04-22 07:37
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
| 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:18.04:LTS"
}
},
"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-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"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "avahi",
"purl": "pkg:deb/ubuntu/avahi@0.7-3.1ubuntu1.3?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.7-3.1ubuntu1.3"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"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:20.04:LTS"
}
},
"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-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"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "avahi",
"purl": "pkg:deb/ubuntu/avahi@0.7-4ubuntu7.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.7-4ubuntu7.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.7-4ubuntu5",
"0.7-4ubuntu6",
"0.7-4ubuntu7"
]
}
],
"aliases": [],
"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",
"id": "USN-5008-1",
"modified": "2026-04-22T07:37:00Z",
"published": "2021-07-07T17:19:33Z",
"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"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "avahi vulnerabilities",
"upstream": [
"UBUNTU-CVE-2021-3468",
"UBUNTU-CVE-2021-3502"
]
}
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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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