SSRF in Kubernetes

CVE-2020-8555

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).

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.037 (88.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-8555?
CVE-2020-8555 is a medium-severity vulnerability in Kubernetes, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.3/10. Published 2020-06-05.
How severe is CVE-2020-8555?
Medium severity. CVSS v3 base score is 6.3 out of 10.
Is CVE-2020-8555 known to be exploited?
20 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.