UBUNTU-CVE-2021-44730

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-44730
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-44730.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-44730
Upstream
Downstream
Related
Published
2022-02-17T17:00:00Z
Modified
2025-07-16T08:27:06.778532Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

References

Affected packages

Ubuntu:Pro:14.04:LTS / snapd

Package

Name
snapd
Purl
pkg:deb/ubuntu/snapd@2.54.3+14.04~esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.54.3+14.04~esm1

Affected versions

2.*

2.21~14.04.2
2.22.2~14.04
2.22.3~14.04
2.22.6~14.04
2.23.1~14.04
2.24.1~14.04
2.25~14.04
2.26.10~14.04
2.27.5~14.04
2.28.5~14.04
2.29.4.2~14.04
2.32.3.2~14.04
2.32.9~14.04
2.33.1~14.04
2.34.2~14.04
2.34.2~14.04.1
2.37.4~14.04.1
2.38~14.04

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.54.3+14.04~esm1"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.54.3+14.04~esm1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / snapd

Package

Name
snapd
Purl
pkg:deb/ubuntu/snapd@2.54.3+16.04~esm2?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.54.3+16.04~esm2

Affected versions

1.*

1.9
1.9.1.1
1.9.2

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
2.48.3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.54.3+16.04~esm2"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.54.3+16.04~esm2"
        }
    ]
}

Ubuntu:18.04:LTS / snapd

Package

Name
snapd
Purl
pkg:deb/ubuntu/snapd@2.54.3+18.04?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.54.3+18.04

Affected versions

2.*

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
2.48.3+18.04
2.49.2+18.04
2.51.1+18.04
2.54.2+18.04ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.54.3+18.04"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.54.3+18.04"
        }
    ]
}

Ubuntu:20.04:LTS / snapd

Package

Name
snapd
Purl
pkg:deb/ubuntu/snapd@2.54.3+20.04?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.54.3+20.04

Affected versions

2.*

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
2.48.3+20.04
2.49.2+20.04
2.51.1+20.04ubuntu2
2.54.2+20.04ubuntu2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "golang-github-snapcore-snapd-dev",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "golang-github-ubuntu-core-snappy-dev",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "snap-confine",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "snapd",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "snapd-dbgsym",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "snapd-xdg-open",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "ubuntu-core-launcher",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "ubuntu-core-snapd-units",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "ubuntu-snappy",
            "binary_version": "2.54.3+20.04"
        },
        {
            "binary_name": "ubuntu-snappy-cli",
            "binary_version": "2.54.3+20.04"
        }
    ]
}