UBUNTU-CVE-2021-38173

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Source
https://ubuntu.com/security/CVE-2021-38173
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-38173
Upstream
Published
2021-08-07T19:15:00Z
Modified
2025-10-24T04:50:28Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Btrbk before 0.31.2 allows command execution because of the mishandling of remote hosts filtering SSH commands using ssh_filter_btrbk.sh in authorized_keys.

References

Affected packages

Ubuntu:16.04:LTS / btrbk

Package

Name
btrbk
Purl
pkg:deb/ubuntu/btrbk@0.22.2-1?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.19.3-1
0.20.0-1
0.21.0-1
0.22.0-1
0.22.1-1
0.22.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "btrbk",
            "binary_version": "0.22.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.json"

Ubuntu:18.04:LTS / btrbk

Package

Name
btrbk
Purl
pkg:deb/ubuntu/btrbk@0.26.0-1?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*
0.25.1-1
0.26.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "btrbk",
            "binary_version": "0.26.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.json"

Ubuntu:20.04:LTS / btrbk

Package

Name
btrbk
Purl
pkg:deb/ubuntu/btrbk@0.27.1-1?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.27.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "btrbk",
            "binary_version": "0.27.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.json"