CVE-2021-20206

HIGH

container_network_interface < 0.8.1 - Path Traversal via Plugin Type Field

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1919391

Scores

CVSS v3 7.2
EPSS 0.0012
EPSS Percentile 30.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-22 CWE-20
Status published
Products (2)
containernetworking/cni 0 - 0.8.1Go
linuxfoundation/container_network_interface < 0.8.1
Published Mar 26, 2021
Tracked Since Feb 18, 2026