CVE-2021-20206

2021-02-0506:22:02

redhat.com

access.redhat.com

cve-2021-20206

path name flaw

network configuration

special elements

binary execution

threat to confidentiality

threat to integrity

system availability

CVSS2

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS3

7.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

47.3%

JSON

An improper limitation of path name flaw was found in containernetworking/cni. 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.