Vulnerability Description
In Contour ( Ingress controller for Kubernetes) before version 1.7.0, a bad actor can shut down all instances of Envoy, essentially killing the entire ingress data plane. GET requests to /shutdown on port 8090 of the Envoy pod initiate Envoy's shutdown procedure. The shutdown procedure includes flipping the readiness endpoint to false, which removes Envoy from the routing pool. When running Envoy (For example on the host network, pod spec hostNetwork=true), the shutdown manager's endpoint is accessible to anyone on the network that can reach the Kubernetes node that's running Envoy. There is no authentication in place that prevents a rogue actor on the network from shutting down Envoy via the shutdown manager endpoint. Successful exploitation of this issue will lead to bad actors shutting down all instances of Envoy, essentially killing the entire ingress data plane. This is fixed in version 1.7.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Projectcontour | Contour | < 1.7.0 |
Related Weaknesses (CWE)
References
- https://github.com/projectcontour/contour/releases/tag/v1.7.0Release NotesThird Party Advisory
- https://github.com/projectcontour/contour/security/advisories/GHSA-mjp8-x484-pm3PatchThird Party Advisory
- https://github.com/projectcontour/contour/releases/tag/v1.7.0Release NotesThird Party Advisory
- https://github.com/projectcontour/contour/security/advisories/GHSA-mjp8-x484-pm3PatchThird Party Advisory
FAQ
What is CVE-2020-15127?
CVE-2020-15127 is a vulnerability with a CVSS score of 7.5 (HIGH). In Contour ( Ingress controller for Kubernetes) before version 1.7.0, a bad actor can shut down all instances of Envoy, essentially killing the entire ingress data plane. GET requests to /shutdown on ...
How severe is CVE-2020-15127?
CVE-2020-15127 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-15127?
Check the references section above for vendor advisories and patch information. Affected products include: Projectcontour Contour.