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CVE-2021-25736

Good to know:

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Date: October 29, 2023

Kube-proxy on Windows can unintentionally forward traffic to local processes listening on the same port (“spec.ports[*].port”) as a LoadBalancer Service when the LoadBalancer controller does not set the “status.loadBalancer.ingress[].ip” field. Clusters where the LoadBalancer controller sets the “status.loadBalancer.ingress[].ip” field are unaffected.

Language: Go

Severity Score

Related Resources (9)

https://github.com/kubernetes/kubernetes
https://security.netapp.com/advisory/ntap-20231221-0003/
https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ
https://github.com/kubernetes/kubernetes/commit/b014610de3e5cf1bb0f7844b5758d29fc18b75e6
https://github.com/advisories/GHSA-35c7-w35f-xwgh
https://security.netapp.com/advisory/ntap-20231221-0003
https://github.com/kubernetes/kubernetes/pull/99958
https://nvd.nist.gov/vuln/detail/CVE-2021-25736
https://www.mend.io/vulnerability-database/CVE-2021-25736

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

Process Control

CWE-114

Top Fix

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Upgrade Version

Upgrade to version k8s.io/kubernetes - v1.21.0;https://github.com/kubernetes/kubernetes.git - 1.20.6;https://github.com/kubernetes/kubernetes.git - 1.19.10;https://github.com/kubernetes/kubernetes.git - 1.18.18;https://github.com/kubernetes/kubernetes.git - 1.21.0

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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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