Vulnerability in Kubernetes
CVE-2020-8558
The Kubelet and kube-proxy components in versions 1.1.0-1.16.10, 1.17.0-1.17.6, and 1.18.0-1.18.3 were found to contain a security issue which allows adjacent hosts to reach TCP and UDP services bound to 127.0.0.1 running on the node or in the node's network namespace. Such a service is generally thought to be reachable only by other processes on the same host, but due to this defeect, could be reachable by other hosts on the same LAN as the node, or by containers running on the same node as the service.
EPSS: 0.036 (88.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Kubernetes — versions prior to 1.18.4, prior to 1.17.7, prior to 1.16.11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jordan@liggitt.net (x_refsource_CONFIRM, Exploit, Patch, Third Party Advisory, Mitigation)
- jordan@liggitt.net (mailing-list, x_refsource_MLIST, Exploit, Mailing List, Third Party Advisory, Mitigation)
- jordan@liggitt.net (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8558?
- CVE-2020-8558 is a medium-severity vulnerability in Kubernetes, classified under Unprotected Alternate Channel. CVSS score: 5.4/10. Published 2020-07-27.
- How severe is CVE-2020-8558?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2020-8558 known to be exploited?
- 45 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.