USN-4728-1 (UBUNTU-CVE-2020-27352)
Vulnerability from osv_ubuntu – Published: 2021-02-10 01:14 – Updated: 2026-02-10 04:42 – Source website
VLAI
Summary
snapd vulnerability
Details
Gilad Reti and Nimrod Stoler discovered that snapd did not correctly specify cgroup delegation when generating systemd service units for various container management snaps. This could allow a local attacker to escalate privileges via access to arbitrary devices of the container host from within a compromised or malicious container.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-27352",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.48.3"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.48.3"
},
{
"binary_name": "snap-confine",
"binary_version": "2.48.3"
},
{
"binary_name": "snapd",
"binary_version": "2.48.3"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.48.3"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.48.3"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.48.3"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.48.3"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.48.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.48.3?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.48.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9",
"1.9.1.1",
"1.9.2",
"2.0",
"2.0.1",
"2.0.2",
"2.0.3",
"2.0.5",
"2.0.8",
"2.0.9",
"2.0.10",
"2.11+0.16.04",
"2.12+0.16.04",
"2.13",
"2.14.2~16.04",
"2.15.2ubuntu1",
"2.16ubuntu3",
"2.17.1ubuntu1",
"2.20.1ubuntu1",
"2.21",
"2.22.2",
"2.22.3",
"2.22.6",
"2.23.1",
"2.24.1",
"2.25",
"2.26.10",
"2.27.5",
"2.28.5",
"2.29.4.2",
"2.32.3.2",
"2.32.9",
"2.33.1ubuntu2",
"2.34.2",
"2.34.2ubuntu0.1",
"2.37.4",
"2.37.4ubuntu0.1",
"2.38",
"2.39.2",
"2.39.2ubuntu0.2",
"2.40",
"2.42.1",
"2.45.1",
"2.45.1ubuntu0.2",
"2.46.1",
"2.47.1",
"2.48"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-27352",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "snap-confine",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "snapd",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.48.3+18.04"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.48.3+18.04"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.48.3+18.04?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.48.3+18.04"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.28.5+17.10",
"2.29.4.1+18.04",
"2.29.4.2+18.04",
"2.31.1+18.04",
"2.32+18.04~pre5",
"2.32+18.04~pre6",
"2.32+18.04",
"2.32.3.2+18.04",
"2.32.5+18.04",
"2.32.8+18.04",
"2.32.9+18.04",
"2.33.1+18.04ubuntu2",
"2.34.2+18.04",
"2.34.2+18.04.1",
"2.37.1+18.04",
"2.37.1.1+18.04",
"2.37.4+18.04",
"2.37.4+18.04.1",
"2.38+18.04",
"2.39.2+18.04",
"2.40+18.04",
"2.42.1+18.04",
"2.45.1+18.04",
"2.45.1+18.04.2",
"2.46.1+18.04",
"2.47.1+18.04",
"2.48+18.04"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-27352",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "snap-confine",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "snapd",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.48.3+20.04"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.48.3+20.04"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.48.3+20.04?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.48.3+20.04"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.41+19.10.1",
"2.42.1+20.04",
"2.43.3+git1.8109f8",
"2.44~pre1+20.04",
"2.44+20.04",
"2.44.2+20.04",
"2.44.3+20.04",
"2.45.1+20.04",
"2.45.1+20.04.2",
"2.46.1+20.04",
"2.47.1+20.04",
"2.48+20.04"
]
}
],
"aliases": [],
"details": "Gilad Reti and Nimrod Stoler discovered that snapd did not correctly specify cgroup\ndelegation when generating systemd service units for various container\nmanagement snaps. This could allow a local attacker to escalate privileges\nvia access to arbitrary devices of the container host from within a\ncompromised or malicious container.\n",
"id": "USN-4728-1",
"modified": "2026-02-10T04:42:03Z",
"published": "2021-02-10T01:14:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4728-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-27352"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "snapd vulnerability",
"upstream": [
"UBUNTU-CVE-2020-27352"
]
}
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