CVE-2021-25736

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.8 MEDIUM
NETWORK
HIGH
HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
kubernetesCNA
5.8 MEDIUM
NETWORK
HIGH
HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
CVEADP
---
---
CISA-ADPADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 31%
VendorProductVersion
kuberneteskubernetes
1.18.0 ≤
𝑥
< 1.18.18
kuberneteskubernetes
1.19.0 ≤
𝑥
< 1.19.10
kuberneteskubernetes
1.20.0 ≤
𝑥
< 1.20.6
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
kubernetes
bullseye
1.20.5+really1.20.2-1
fixed
sid
1.20.5+really1.20.2-1.1
fixed
trixie
1.20.5+really1.20.2-1.1
fixed
bookworm
1.20.5+really1.20.2-1.1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
kubernetes
hirsute
not-affected
groovy
not-affected
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
Common Weakness Enumeration
References
https://github.com/kubernetes/kubernetes/pull/99958
https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ
https://security.netapp.com/advisory/ntap-20231221-0003/
https://github.com/kubernetes/kubernetes/pull/99958
https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ
https://security.netapp.com/advisory/ntap-20231221-0003/