UBUNTU-CVE-2021-43566

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Source

https://ubuntu.com/security/CVE-2021-43566

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43566.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-43566

Related

Published

2022-01-11T16:15:00Z

Modified

2025-07-01T04:59:53Z

Severity

2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator

Summary

[none]

Details

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.

References

Affected packages

Ubuntu:Pro:14.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.14.04.20+esm14?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2:3.*

2:3.6.18-1ubuntu3

2:4.*

2:4.0.10+dfsg-4ubuntu2

2:4.0.13+dfsg-1ubuntu1

2:4.1.3+dfsg-2ubuntu2

2:4.1.3+dfsg-2ubuntu3

2:4.1.3+dfsg-2ubuntu4

2:4.1.3+dfsg-2ubuntu5

2:4.1.6+dfsg-1ubuntu1

2:4.1.6+dfsg-1ubuntu2

2:4.1.6+dfsg-1ubuntu2.14.04.1

2:4.1.6+dfsg-1ubuntu2.14.04.2

2:4.1.6+dfsg-1ubuntu2.14.04.3

2:4.1.6+dfsg-1ubuntu2.14.04.4

2:4.1.6+dfsg-1ubuntu2.14.04.5

2:4.1.6+dfsg-1ubuntu2.14.04.7

2:4.1.6+dfsg-1ubuntu2.14.04.8

2:4.1.6+dfsg-1ubuntu2.14.04.9

2:4.1.6+dfsg-1ubuntu2.14.04.11

2:4.1.6+dfsg-1ubuntu2.14.04.12

2:4.1.6+dfsg-1ubuntu2.14.04.13

2:4.3.8+dfsg-0ubuntu0.14.04.2

2:4.3.9+dfsg-0ubuntu0.14.04.1

2:4.3.9+dfsg-0ubuntu0.14.04.3

2:4.3.11+dfsg-0ubuntu0.14.04.1

2:4.3.11+dfsg-0ubuntu0.14.04.2

2:4.3.11+dfsg-0ubuntu0.14.04.3

2:4.3.11+dfsg-0ubuntu0.14.04.4

2:4.3.11+dfsg-0ubuntu0.14.04.6

2:4.3.11+dfsg-0ubuntu0.14.04.7

2:4.3.11+dfsg-0ubuntu0.14.04.8

2:4.3.11+dfsg-0ubuntu0.14.04.9

2:4.3.11+dfsg-0ubuntu0.14.04.10

2:4.3.11+dfsg-0ubuntu0.14.04.11

2:4.3.11+dfsg-0ubuntu0.14.04.12

2:4.3.11+dfsg-0ubuntu0.14.04.13

2:4.3.11+dfsg-0ubuntu0.14.04.14

2:4.3.11+dfsg-0ubuntu0.14.04.16

2:4.3.11+dfsg-0ubuntu0.14.04.17

2:4.3.11+dfsg-0ubuntu0.14.04.19

2:4.3.11+dfsg-0ubuntu0.14.04.20

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm2

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm4

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm8

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm11

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm12

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13

2:4.3.11+dfsg-0ubuntu0.14.04.20+esm14

Ecosystem specific

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:16.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.16.04.34+esm3?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2:4.*

2:4.1.17+dfsg-4ubuntu2

2:4.1.20+dfsg-1ubuntu1

2:4.1.20+dfsg-1ubuntu2

2:4.1.20+dfsg-1ubuntu3

2:4.1.20+dfsg-1ubuntu5

2:4.3.3+dfsg-1ubuntu1

2:4.3.3+dfsg-1ubuntu2

2:4.3.3+dfsg-1ubuntu3

2:4.3.6+dfsg-1ubuntu1

2:4.3.8+dfsg-0ubuntu1

2:4.3.9+dfsg-0ubuntu0.16.04.1

2:4.3.9+dfsg-0ubuntu0.16.04.2

2:4.3.9+dfsg-0ubuntu0.16.04.3

2:4.3.11+dfsg-0ubuntu0.16.04.1

2:4.3.11+dfsg-0ubuntu0.16.04.3

2:4.3.11+dfsg-0ubuntu0.16.04.5

2:4.3.11+dfsg-0ubuntu0.16.04.6

2:4.3.11+dfsg-0ubuntu0.16.04.7

2:4.3.11+dfsg-0ubuntu0.16.04.8

2:4.3.11+dfsg-0ubuntu0.16.04.9

2:4.3.11+dfsg-0ubuntu0.16.04.10

2:4.3.11+dfsg-0ubuntu0.16.04.11

2:4.3.11+dfsg-0ubuntu0.16.04.12

2:4.3.11+dfsg-0ubuntu0.16.04.13

2:4.3.11+dfsg-0ubuntu0.16.04.15

2:4.3.11+dfsg-0ubuntu0.16.04.16

2:4.3.11+dfsg-0ubuntu0.16.04.17

2:4.3.11+dfsg-0ubuntu0.16.04.18

2:4.3.11+dfsg-0ubuntu0.16.04.19

2:4.3.11+dfsg-0ubuntu0.16.04.20

2:4.3.11+dfsg-0ubuntu0.16.04.21

2:4.3.11+dfsg-0ubuntu0.16.04.23

2:4.3.11+dfsg-0ubuntu0.16.04.24

2:4.3.11+dfsg-0ubuntu0.16.04.25

2:4.3.11+dfsg-0ubuntu0.16.04.26

2:4.3.11+dfsg-0ubuntu0.16.04.27

2:4.3.11+dfsg-0ubuntu0.16.04.28

2:4.3.11+dfsg-0ubuntu0.16.04.29

2:4.3.11+dfsg-0ubuntu0.16.04.30

2:4.3.11+dfsg-0ubuntu0.16.04.31

2:4.3.11+dfsg-0ubuntu0.16.04.32

2:4.3.11+dfsg-0ubuntu0.16.04.34

2:4.3.11+dfsg-0ubuntu0.16.04.34+esm1

2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2

2:4.3.11+dfsg-0ubuntu0.16.04.34+esm3

Ecosystem specific

{
    "ubuntu_priority": "low"
}

Ubuntu:Pro:18.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm2?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2:4.*

2:4.6.7+dfsg-1ubuntu3

2:4.7.1+dfsg-1ubuntu1

2:4.7.3+dfsg-1ubuntu1

2:4.7.4+dfsg-1ubuntu1

2:4.7.6+dfsg~ubuntu-0ubuntu1

2:4.7.6+dfsg~ubuntu-0ubuntu2

2:4.7.6+dfsg~ubuntu-0ubuntu2.2

2:4.7.6+dfsg~ubuntu-0ubuntu2.4

2:4.7.6+dfsg~ubuntu-0ubuntu2.5

2:4.7.6+dfsg~ubuntu-0ubuntu2.6

2:4.7.6+dfsg~ubuntu-0ubuntu2.7

2:4.7.6+dfsg~ubuntu-0ubuntu2.9

2:4.7.6+dfsg~ubuntu-0ubuntu2.10

2:4.7.6+dfsg~ubuntu-0ubuntu2.11

2:4.7.6+dfsg~ubuntu-0ubuntu2.13

2:4.7.6+dfsg~ubuntu-0ubuntu2.14

2:4.7.6+dfsg~ubuntu-0ubuntu2.15

2:4.7.6+dfsg~ubuntu-0ubuntu2.16

2:4.7.6+dfsg~ubuntu-0ubuntu2.17

2:4.7.6+dfsg~ubuntu-0ubuntu2.18

2:4.7.6+dfsg~ubuntu-0ubuntu2.19

2:4.7.6+dfsg~ubuntu-0ubuntu2.20

2:4.7.6+dfsg~ubuntu-0ubuntu2.21

2:4.7.6+dfsg~ubuntu-0ubuntu2.23

2:4.7.6+dfsg~ubuntu-0ubuntu2.24

2:4.7.6+dfsg~ubuntu-0ubuntu2.26

2:4.7.6+dfsg~ubuntu-0ubuntu2.27

2:4.7.6+dfsg~ubuntu-0ubuntu2.28

2:4.7.6+dfsg~ubuntu-0ubuntu2.29

2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1

2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm2

Ecosystem specific

{
    "ubuntu_priority": "low"
}

Ubuntu:20.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.13.17~dfsg-0ubuntu0.21.04.1?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2:4.13.17~dfsg-0ubuntu0.21.04.1

Affected versions

2:4.*

2:4.10.7+dfsg-0ubuntu2

2:4.10.7+dfsg-0ubuntu3

2:4.11.1+dfsg-3ubuntu1

2:4.11.1+dfsg-3ubuntu2

2:4.11.1+dfsg-3ubuntu4

2:4.11.5+dfsg-1ubuntu1

2:4.11.5+dfsg-1ubuntu2

2:4.11.6+dfsg-0ubuntu1

2:4.11.6+dfsg-0ubuntu1.1

2:4.11.6+dfsg-0ubuntu1.2

2:4.11.6+dfsg-0ubuntu1.3

2:4.11.6+dfsg-0ubuntu1.4

2:4.11.6+dfsg-0ubuntu1.5

2:4.11.6+dfsg-0ubuntu1.6

2:4.11.6+dfsg-0ubuntu1.8

2:4.11.6+dfsg-0ubuntu1.9

2:4.11.6+dfsg-0ubuntu1.10

2:4.13.14+dfsg-0ubuntu0.20.04.1

2:4.13.14+dfsg-0ubuntu0.20.04.2

2:4.13.14+dfsg-0ubuntu0.20.04.3

2:4.13.14+dfsg-0ubuntu0.20.04.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "ctdb",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "ctdb-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libnss-winbind-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libpam-winbind-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libsmbclient",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libsmbclient-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libsmbclient-dev",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libwbclient-dev",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "libwbclient0-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "python3-samba",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "python3-samba-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "registry-tools",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "registry-tools-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-common-bin-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-dev",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-dsdb-modules-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-libs-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-testsuite-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "samba-vfs-modules-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "smbclient-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        },
        {
            "binary_name": "winbind-dbgsym",
            "binary_version": "2:4.13.17~dfsg-0ubuntu0.21.04.1"
        }
    ],
    "ubuntu_priority": "low",
    "availability": "No subscription required"
}