CVE-2021-20206

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.

• CVE ID
• CVE-2021-20206

• Assigner
• secalert@redhat.com

• Vulnerability Status
• Analyzed

• Published Version
• 2021-03-26T22:15:12

• Last Modified Date
• 2022-08-05T17:42:13

• Version
• 2.0

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

• Access Vector
• NETWORK

• Access Compatibility
• LOW

• Authentication
• SINGLE

• Confidentiality Impact
• PARTIAL

• Integrity Impact
• PARTIAL

• Availability Impact
• PARTIAL

• Base Score
• 6.5

• Severity
• MEDIUM

• Exploitability Score
• 8

• Impact Score
• 6.4

• Version
• 3.1

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

• Attack Vector
• NETWORK

• Attack Compatibility
• LOW

• Privileges Required
• HIGH

• User Interaction
• NONE

• Scope
• UNCHANGED

• Confidentiality Impact
• HIGH

• Availability Impact
• HIGH

• Base Score
• 7.2

• Base Severity
• HIGH

• Exploitability Score
• 1.2

• Impact Score
• 5.9