What’s Vulnerable › Vulnerabilities

CVE-2020-8555: Kubernetes kube-controller-manager SSRF

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-05 · updated 2026-06-17
• Weakness: CWE-918

Description

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Affected products

• Fedoraproject Fedora: 32
• Kubernetes: before 1.15.11; from 1.16.0 before 1.16.9; from 1.17.0 before 1.17.5; 1.18.0 — fixed in 1.15.11, 1.16.9, 1.17.5

How to fix

Upgrade to a fixed version: Kubernetes 1.15.11, 1.16.9, 1.17.5. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2020/06/01/4
• http://www.openwall.com/lists/oss-security/2021/05/04/8
• https://github.com/kubernetes/kubernetes/issues/91542
• https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
• https://security.netapp.com/advisory/ntap-20200724-0005/
• http://www.openwall.com/lists/oss-security/2020/06/01/4
• http://www.openwall.com/lists/oss-security/2021/05/04/8
• https://github.com/kubernetes/kubernetes/issues/91542
• https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
• https://security.netapp.com/advisory/ntap-20200724-0005/

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