UBUNTU-CVE-2021-31800

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Source
https://ubuntu.com/security/CVE-2021-31800
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-31800.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-31800
Upstream
Published
2021-05-05T11:15:00Z
Modified
2025-07-14T06:45:37.049138Z
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
  • - medium
Summary
[none]
Details

Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. This could potentially be abused to achieve arbitrary code execution by replacing /etc/shadow or an SSH authorized key.

References

Affected packages

Ubuntu:Pro:16.04:LTS / impacket

Package

Name
impacket
Purl
pkg:deb/ubuntu/impacket@0.9.12-1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

0.*

0.9.12-1

Ubuntu:Pro:18.04:LTS / impacket

Package

Name
impacket
Purl
pkg:deb/ubuntu/impacket@0.9.15-1?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

0.*

0.9.15-1

Ubuntu:Pro:20.04:LTS / impacket

Package

Name
impacket
Purl
pkg:deb/ubuntu/impacket@0.9.20-5?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

0.*

0.9.15-5
0.9.20-4
0.9.20-5

Ubuntu:22.04:LTS / impacket

Package

Name
impacket
Purl
pkg:deb/ubuntu/impacket@0.9.24-1?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*

0.9.22-2
0.9.24-1

Ubuntu:24.04:LTS / impacket

Package

Name
impacket
Purl
pkg:deb/ubuntu/impacket@0.11.0-2?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*

0.11.0-1
0.11.0-2

Ubuntu:25.04 / impacket

Package

Name
impacket
Purl
pkg:deb/ubuntu/impacket@0.12.0-3?arch=source&distro=plucky

Affected ranges

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

Affected versions

0.*

0.11.0-2
0.12.0-2
0.12.0-3