CVE-2021-20206
Last modified
CVE-2021-20206 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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. EPSS estimates a 1.52% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Container Network Interface | < 0.8.1 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1919391Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1919391Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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