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CVE-2021-25736

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Date: January 22, 2021

A flaw was found in the Windows kube-proxy component in Kubernetes before 1.18.18, 1.19.10, 1.20.6, 1.21.0. In a cloud environment that does not set the “.status.loadBalancer.ingress.ip” field in the LoadBalancer service status configuration (for example in AWS) the packets can be misrouted and reach an unintended destination.

Language: Go

Severity Score

Related Resources (4)

https://github.com/kubernetes/kubernetes/commit/b014610de3e5cf1bb0f7844b5758d29fc18b75e6
https://nvd.nist.gov/vuln/detail/CVE-2021-25736
https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25736

Severity Score

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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