USN-5292-1

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Source
https://ubuntu.com/security/notices/USN-5292-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5292-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-5292-1
Upstream
Related
Published
2022-02-17T17:24:49.258249Z
Modified
2025-10-15T16:38:17Z
Summary
snapd vulnerabilities
Details

James Troup discovered that snap did not properly manage the permissions for the snap directories. A local attacker could possibly use this issue to expose sensitive information. (CVE-2021-3155)

Ian Johnson discovered that snapd did not properly validate content interfaces and layout paths. A local attacker could possibly use this issue to inject arbitrary AppArmor policy rules, resulting in a bypass of intended access restrictions. (CVE-2021-4120)

The Qualys Research Team discovered that snapd did not properly validate the location of the snap-confine binary. A local attacker could possibly use this issue to execute other arbitrary binaries and escalate privileges. (CVE-2021-44730)

The Qualys Research Team discovered that a race condition existed in the snapd snap-confine binary when preparing a private mount namespace for a snap. A local attacker could possibly use this issue to escalate privileges and execute arbitrary code. (CVE-2021-44731)

References

Affected packages

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_version": "2.54.3+18.04",
            "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-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"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-3155",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2021-4120",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2021-44730",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/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": "Ubuntu",
                    "score": "high"
                }
            ]
        },
        {
            "id": "CVE-2021-44731",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ]
}

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_version": "2.54.3+20.04",
            "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-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"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:20.04:LTS",
    "cves": []
}