CVE-2021-20206

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Source
https://cve.org/CVERecord?id=CVE-2021-20206
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20206.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-20206
Aliases
Downstream
Related
Published
2021-03-26T22:15:12.617Z
Modified
2026-05-08T08:00:35.229443Z
Severity
  • 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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

Affected packages

Git / github.com/containernetworking/cni

Affected ranges

Type
GIT
Repo
https://github.com/containernetworking/cni
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9fc34aee0a6396d6484992035819c92c42522eea
Database specific 
{
    "source": "CPE_FIELD",
    "cpe": "cpe:2.3:a:linuxfoundation:container_network_interface:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.1"
        }
    ]
}

Affected versions

spec-v0.*
spec-v0.4.0
v0.*
v0.1.0
v0.2.0-rc0
v0.3.0
v0.3.0-rc0
v0.3.0-rc1
v0.3.0-rc2
v0.4.0
v0.5.0
v0.5.0-rc1
v0.5.1
v0.5.2
v0.6.0
v0.6.0-rc1
v0.6.0-rc2
v0.7.0
v0.7.0-alpha0
v0.7.0-alpha1
v0.7.0-rc1
v0.7.0-rc2
v0.7.1
v0.8.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20206.json"