UBUNTU-CVE-2021-3716

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Source
https://ubuntu.com/security/CVE-2021-3716
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3716.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3716
Upstream
Published
2022-03-02T23:15:00Z
Modified
2025-09-08T16:46:47Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBDOPTSTRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.

References

Affected packages

Ubuntu:Pro:16.04:LTS / nbdkit

Package

Name
nbdkit
Purl
pkg:deb/ubuntu/nbdkit@1.1.11-1build1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.1.10-1
1.1.11-1
1.1.11-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nbdkit",
            "binary_version": "1.1.11-1build1"
        },
        {
            "binary_name": "nbdkit-plugin-dev",
            "binary_version": "1.1.11-1build1"
        },
        {
            "binary_name": "nbdkit-plugin-guestfs",
            "binary_version": "1.1.11-1build1"
        },
        {
            "binary_name": "nbdkit-plugin-libvirt",
            "binary_version": "1.1.11-1build1"
        },
        {
            "binary_name": "nbdkit-plugin-perl",
            "binary_version": "1.1.11-1build1"
        },
        {
            "binary_name": "nbdkit-plugin-python",
            "binary_version": "1.1.11-1build1"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / nbdkit

Package

Name
nbdkit
Purl
pkg:deb/ubuntu/nbdkit@1.16.2-1ubuntu3?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.12.4-1
1.12.4-1build1
1.14.2-3
1.16.1-2
1.16.1-3
1.16.1-3ubuntu1
1.16.2-1ubuntu1
1.16.2-1ubuntu2
1.16.2-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nbdkit",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-dev",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-guestfs",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-libvirt",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-lua",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-perl",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-python",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-ruby",
            "binary_version": "1.16.2-1ubuntu3"
        },
        {
            "binary_name": "nbdkit-plugin-tcl",
            "binary_version": "1.16.2-1ubuntu3"
        }
    ]
}

Ubuntu:22.04:LTS / nbdkit

Package

Name
nbdkit
Purl
pkg:deb/ubuntu/nbdkit@1.24.1-2ubuntu4?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.24.1-2ubuntu1
1.24.1-2ubuntu2
1.24.1-2ubuntu3
1.24.1-2ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nbdkit",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-dev",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-guestfs",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-libvirt",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-lua",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-perl",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-python",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-ruby",
            "binary_version": "1.24.1-2ubuntu4"
        },
        {
            "binary_name": "nbdkit-plugin-tcl",
            "binary_version": "1.24.1-2ubuntu4"
        }
    ]
}

Ubuntu:24.04:LTS / nbdkit

Package

Name
nbdkit
Purl
pkg:deb/ubuntu/nbdkit@1.36.3-1ubuntu10?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.34.4-1ubuntu1
1.36.1-1ubuntu1
1.36.2-1ubuntu1
1.36.3-1ubuntu2
1.36.3-1ubuntu3
1.36.3-1ubuntu9
1.36.3-1ubuntu10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nbdkit",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-dev",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-guestfs",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-libvirt",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-lua",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-perl",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-python",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-ruby",
            "binary_version": "1.36.3-1ubuntu10"
        },
        {
            "binary_name": "nbdkit-plugin-tcl",
            "binary_version": "1.36.3-1ubuntu10"
        }
    ]
}

Ubuntu:25.04 / nbdkit

Package

Name
nbdkit
Purl
pkg:deb/ubuntu/nbdkit@1.42.2-1ubuntu1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.40.4-1ubuntu1
1.40.4-1ubuntu2
1.40.4-3ubuntu1
1.40.4-5ubuntu1
1.40.4-6ubuntu1
1.40.4-9ubuntu4
1.40.4-11ubuntu2
1.40.4-11ubuntu3
1.40.5-1ubuntu1
1.42.0-1ubuntu1
1.42.1-1ubuntu1
1.42.2-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nbdkit",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-dev",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-guestfs",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-libvirt",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-lua",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-perl",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-python",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-tcl",
            "binary_version": "1.42.2-1ubuntu1"
        },
        {
            "binary_name": "nbdkit-plugin-vddk",
            "binary_version": "1.42.2-1ubuntu1"
        }
    ]
}