Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Published

2023-10-30T03:15:07.653

Last Modified

2025-06-12T15:15:27.407

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.8 (MEDIUM)

Weaknesses

Type: Primary
NVD-CWE-noinfo
Type: Secondary
CWE-114

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	kubernetes	kubernetes	< 1.18.18	Yes
Application	kubernetes	kubernetes	< 1.19.10	Yes
Application	kubernetes	kubernetes	< 1.20.6	Yes
Operating System	microsoft	windows	-	No

References

https://github.com/kubernetes/kubernetes/pull/99958 Third Party Advisory ([email protected])
https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ Mailing List, Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20231221-0003/ ([email protected])
https://github.com/kubernetes/kubernetes/pull/99958 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20231221-0003/ (af854a3a-2127-422b-91ae-364da2661108)