CVE-2021-25736
October 30, 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.
Affected Packages
https://github.com/kubernetes/kubernetes.git (GITHUB):
Affected version(s) >=v0.2 <1.18.18Fix Suggestion:
Update to version 1.18.18https://github.com/kubernetes/kubernetes.git (GITHUB):
Affected version(s) >=v1.20.0-alpha.0 <1.20.6Fix Suggestion:
Update to version 1.20.6https://github.com/kubernetes/kubernetes.git (GITHUB):
Affected version(s) >=v1.19.0-alpha.0 <1.19.10Fix Suggestion:
Update to version 1.19.10https://github.com/kubernetes/kubernetes.git (GITHUB):
Affected version(s) =v1.20.5 <1.21.0Fix Suggestion:
Update to version 1.21.0Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Process Control
EPSS
Base Score:
0.08
