UBUNTU-CVE-2021-3429

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Source
https://ubuntu.com/security/CVE-2021-3429
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3429.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-3429
Upstream
Published
2023-04-19T22:15:00Z
Modified
2025-07-16T07:55:23.334145Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

When instructing cloud-init to set a random password for a new user account, versions before 21.2 would write that password to the world-readable log file /var/log/cloud-init-output.log. This could allow a local user to log in as another user.

References

Affected packages

Ubuntu:16.04:LTS / cloud-init

Package

Name
cloud-init
Purl
pkg:deb/ubuntu/cloud-init@21.1-19-gbad84ad4-0ubuntu1~16.04.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
21.1-19-gbad84ad4-0ubuntu1~16.04.1

Affected versions

0.*

0.7.7~bzr1149-0ubuntu1
0.7.7~bzr1154-0ubuntu1
0.7.7~bzr1155-0ubuntu1
0.7.7~bzr1156-0ubuntu1
0.7.7~bzr1156-0ubuntu2
0.7.7~bzr1160-0ubuntu1
0.7.7~bzr1176-0ubuntu1
0.7.7~bzr1182-0ubuntu1
0.7.7~bzr1189-0ubuntu1
0.7.7~bzr1192-0ubuntu1
0.7.7~bzr1192-0ubuntu2
0.7.7~bzr1200-0ubuntu1
0.7.7~bzr1208-0ubuntu1
0.7.7~bzr1209-0ubuntu1
0.7.7~bzr1212-0ubuntu1
0.7.7~bzr1246-0ubuntu1~16.04.1
0.7.7~bzr1256-0ubuntu1~16.04.1
0.7.8-1-g3705bb5-0ubuntu1~16.04.1
0.7.8-1-g3705bb5-0ubuntu1~16.04.3
0.7.8-49-g9e904bb-0ubuntu1~16.04.1
0.7.8-49-g9e904bb-0ubuntu1~16.04.2
0.7.8-49-g9e904bb-0ubuntu1~16.04.3
0.7.8-49-g9e904bb-0ubuntu1~16.04.4
0.7.9-0ubuntu1~16.04.2
0.7.9-48-g1c795b9-0ubuntu1~16.04.1
0.7.9-90-g61eb03fe-0ubuntu1~16.04.1
0.7.9-113-g513e99e0-0ubuntu1~16.04.1
0.7.9-153-g16a7302f-0ubuntu1~16.04.1
0.7.9-153-g16a7302f-0ubuntu1~16.04.2
0.7.9-233-ge586fe35-0ubuntu1~16.04.1
0.7.9-233-ge586fe35-0ubuntu1~16.04.2

17.*

17.1-27-geb292c18-0ubuntu1~16.04.1
17.1-46-g7acc9e68-0ubuntu1~16.04.1
17.2-35-gf576b2a2-0ubuntu1~16.04.2

18.*

18.2-4-g05926e48-0ubuntu1~16.04.1
18.2-4-g05926e48-0ubuntu1~16.04.2
18.3-9-g2e62cb8a-0ubuntu1~16.04.2
18.4-0ubuntu1~16.04.2
18.5-21-g8ee294d5-0ubuntu1~16.04.1
18.5-45-g3554ffe8-0ubuntu1~16.04.1

19.*

19.1-1-gbaa47854-0ubuntu1~16.04.1
19.2-24-ge7881d5c-0ubuntu1~16.04.1
19.2-36-g059d049c-0ubuntu1~16.04.1
19.2-36-g059d049c-0ubuntu2~16.04.1
19.3-41-gc4735dd3-0ubuntu1~16.04.1
19.4-33-gbb4131a2-0ubuntu1~16.04.1

20.*

20.2-45-g5f7825e2-0ubuntu1~16.04.1
20.3-2-g371b392c-0ubuntu1~16.04.1
20.4-0ubuntu1~16.04.1
20.4-0ubuntu1~16.04.2
20.4.1-0ubuntu1~16.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "21.1-19-gbad84ad4-0ubuntu1~16.04.1",
            "binary_name": "cloud-init"
        },
        {
            "binary_version": "21.1-19-gbad84ad4-0ubuntu1~16.04.1",
            "binary_name": "ec2-init"
        },
        {
            "binary_version": "21.1-19-gbad84ad4-0ubuntu1~16.04.1",
            "binary_name": "grub-legacy-ec2"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:18.04:LTS / cloud-init

Package

Name
cloud-init
Purl
pkg:deb/ubuntu/cloud-init@21.1-19-gbad84ad4-0ubuntu1~18.04.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
21.1-19-gbad84ad4-0ubuntu1~18.04.1

Affected versions

17.*

17.1-18-gd4f70470-0ubuntu1
17.1-25-g17a15f9e-0ubuntu1~17.10.1
17.1-25-g17a15f9e-0ubuntu1
17.1-27-geb292c18-0ubuntu1
17.1-41-g76243487-0ubuntu1
17.1-46-g7acc9e68-0ubuntu1
17.1-51-g05b2308a-0ubuntu1
17.1-53-ga5dc0f42-0ubuntu1
17.1-58-g703241a3-0ubuntu1
17.1-60-ga30a3bb5-0ubuntu1
17.2-1-g4089e20c-0ubuntu1
17.2-9-gdf24daa8-0ubuntu1
17.2-13-g6299e8d0-0ubuntu1
17.2-20-g32a6a176-0ubuntu1
17.2-25-gc03bdd3d-0ubuntu1
17.2-30-gf7deaf15-0ubuntu1
17.2-34-g644048e3-0ubuntu1

18.*

18.1-0ubuntu1
18.1-5-g40e77380-0ubuntu1
18.1-17-g97012fbb-0ubuntu1
18.1-23-gde34dc7c-0ubuntu1
18.1-26-g685f9901-0ubuntu1
18.1-35-ge0f644b7-0ubuntu1
18.1-35-ge0f644b7-0ubuntu2
18.2-0ubuntu1
18.2-4-g05926e48-0ubuntu1
18.2-4-g05926e48-0ubuntu2
18.2-9-g49b562c9-0ubuntu1
18.2-14-g6d48d265-0ubuntu1
18.2-27-g6ef92c98-0ubuntu1~18.04.1
18.3-9-g2e62cb8a-0ubuntu1~18.04.2
18.4-0ubuntu1~18.04.1
18.5-21-g8ee294d5-0ubuntu1~18.04.1
18.5-45-g3554ffe8-0ubuntu1~18.04.1

19.*

19.1-1-gbaa47854-0ubuntu1~18.04.1
19.2-24-ge7881d5c-0ubuntu1~18.04.1
19.2-36-g059d049c-0ubuntu1~18.04.1
19.2-36-g059d049c-0ubuntu2~18.04.1
19.3-41-gc4735dd3-0ubuntu1~18.04.1
19.4-33-gbb4131a2-0ubuntu1~18.04.1

20.*

20.2-45-g5f7825e2-0ubuntu1~18.04.1
20.3-2-g371b392c-0ubuntu1~18.04.1
20.4-0ubuntu1~18.04.1
20.4-0ubuntu1~18.04.2
20.4.1-0ubuntu1~18.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "21.1-19-gbad84ad4-0ubuntu1~18.04.1",
            "binary_name": "cloud-init"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / cloud-init

Package

Name
cloud-init
Purl
pkg:deb/ubuntu/cloud-init@21.1-19-gbad84ad4-0ubuntu1~20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
21.1-19-gbad84ad4-0ubuntu1~20.04.1

Affected versions

19.*

19.2-36-g059d049c-0ubuntu3
19.2-78-ge8138959-0ubuntu1
19.3-0ubuntu1
19.3-23-gfb04493e-0ubuntu1
19.3-30-g4bc399e0-0ubuntu1
19.3-40-gf69d33a7-0ubuntu1
19.3-41-gc4735dd3-0ubuntu1
19.3-74-g129b1c4e-0ubuntu1
19.4-1-g8c96cbc1-0ubuntu1
19.4-16-gf8950d63-0ubuntu1
19.4-31-g3f6192b3-0ubuntu1
19.4-33-gbb4131a2-0ubuntu1
19.4-56-g06e324ff-0ubuntu1

20.*

20.1-0ubuntu1
20.1-5-g67c8e53c-0ubuntu1
20.1-9-g1f860e5a-0ubuntu1
20.1-10-g71af48df-0ubuntu1
20.1-10-g71af48df-0ubuntu2
20.1-10-g71af48df-0ubuntu3
20.1-10-g71af48df-0ubuntu5
20.2-45-g5f7825e2-0ubuntu1~20.04.1
20.3-2-g371b392c-0ubuntu1~20.04.1
20.4-0ubuntu1~20.04.1
20.4-0ubuntu1~20.04.2
20.4.1-0ubuntu1~20.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "21.1-19-gbad84ad4-0ubuntu1~20.04.1",
            "binary_name": "cloud-init"
        }
    ],
    "availability": "No subscription required"
}