CVE-2021-25736

2023-10-3003:15:07

[email protected]

web.nvd.nist.gov

kube-proxy

windows

traffic forwarding

vulnerability

loadbalancer

service

controller

status field

ingress ip

cluster safety

CVSS3

6.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

AI Score

6.1

Confidence

High

EPSS

0.001

Percentile

29.2%

JSON

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.