CVE-2020-5416: CF clusters with NGINX in front of them may be vulnerable to DoS | Cloud Foundry

Severity

High

Vendor

Cloud Foundry Foundation

Description

Cloud Foundry Routing (Gorouter), versions prior to 0.204.0, when used in a deployment with NGINX reverse proxies in front of the Gorouters, is potentially vulnerable to denial-of-service attacks in which an unauthenticated malicious attacker can send specially-crafted HTTP requests that may cause the Gorouters to be dropped from the NGINX backend pool.

Affected Cloud Foundry Products and Versions

Severity is high unless otherwise noted.

• Routing
  • All versions prior to 0.204.0
• CF Deployment
  • All versions prior to 13.13.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• Routing
  • Upgrade all versions to 0.204.0 or greater
• CF Deployment
  • Upgrade all versions to 13.13.0 or greater

History

2020-08-13: Initial vulnerability report published.