Vulnerability in Kubernetes
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[].i…
EPSS: 0.009 (56.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Kubernetes — versions 0
- Microsoft Windows
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jordan@liggitt.net (Third Party Advisory)
- jordan@liggitt.net (Mailing List, Third Party Advisory)
- jordan@liggitt.net
Frequently asked questions
- What is CVE-2021-25736?
- CVE-2021-25736 is a medium-severity vulnerability in Kubernetes, classified under Process Control. CVSS score: 5.8/10. Published 2023-10-30.
- How severe is CVE-2021-25736?
- Medium severity. CVSS v3 base score is 5.8 out of 10.
- Is CVE-2021-25736 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.