containernetworking/cni · Security
containernetworking/cni improper limitation of path name
- GHSA ID
- GHSA-xjqr-g762-pxwp
- CVE ID
- CVE-2021-20206
- Severity
- high
- Published
- Updated
- CVSS
- 7.2 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 7.2 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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.
Specific Go Packages Affected
github.com/containernetworking/cni/pkg/invoke
CWEs
- CWE-20 · Improper Input Validation
- CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-20206 ↗
- https://github.com/containernetworking/cni/pull/808 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=1919391 ↗
- https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMCONTAINERNETWORKINGCNIPKGINVOKE-1070549 ↗
- https://pkg.go.dev/vuln/GO-2022-0230 ↗
- https://github.com/advisories/GHSA-xjqr-g762-pxwp ↗