CVE-2021-20206

HighCVSS 7.2/10Last modified Jun 17, 2026

Description

An improper limitation of path name flaw was found in containernetworking/cni in versions before 0.8.1. When specifying the plugin to load in the 'type' field in the network configuration, it is possible to use special elements such as "../" separators to reference binaries elsewhere on the system. This flaw allows an attacker to execute other existing binaries other than the cni plugins/types, such as 'reboot'. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Metrics

CVSS 3.1 7.2/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-20CWE-22

Affected software

VendorProductVersions
n/acontainernetworking-cnicontainernetworking/cni 0.8.1

References

Timeline

Published
Mar 26, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-20206: High severity, CVSS 7.2 | Vulnix