CVE-2020-5420 Gorouter is vulnerable to DoS attack via invalid HTTP responses
A malicious developer can crash Cloud Foundry Gorouters by pushing an app with crafted HTTP responses, causing cluster-wide denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-5420?
CVE-2020-5420 is a high-severity denial of service vulnerability in Cloud Foundry CF Deployment, published on 3 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cloud Foundry Routing (Gorouter) versions prior to 0.206.0 allow a malicious developer with "cf push" access to cause denial-of-service to the CF cluster by pushing an app that returns specially crafted HTTP responses that crash the Gorouters.
Weakness: CWE-754
Which versions are affected by CVE-2020-5420?
It affects 2 products.
Products include Cloudfoundry Cf-Deployment, Cloudfoundry Gorouter.
How do I fix CVE-2020-5420?
No fix has been published for CVE-2020-5420 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-5420 being exploited?
There is no known exploitation of CVE-2020-5420 in the wild and no public exploit code.
Other vulnerabilities in Cloud Foundry CF Deployment
- CVE-2022-31733 Auth bypass in Cloud Foundry Diego and CF Deployment
- CVE-2020-5402 UAA fails to check the state parameter when authenticating with external IDPs
- CVE-2019-11293 UAA logs all query parameters with debug logging level
- CVE-2019-11290 Cloud Foundry UAA logs query parameters in tomcat access file
- CVE-2019-11283 Password leak in smbdriver logs
Sources
Also known as GHSA-jf63-p3cp-7qf7.