CVSS 3.1
7.2 highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HCVE-2021-20206
High (7.2) in linuxfoundation container network interface. EPSS 1.5% chance of exploitation in the next 30 days. Fixed in github.com/containernetworking/cni 0.8.1.
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.
Severity
- EPSS
- 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linuxfoundation:container_network_interface
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xjqr-g762-pxwp | Go | github.com/containernetworking/cni | <0.8.1 | 0.8.1 |
| GO-2022-0230 | Go | github.com/containernetworking/cni | <0.8.1 | 0.8.1 |