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CVE-2020-5416

CF clusters with NGINX in front of them may be vulnerable to DoS

No known exploitation. EPSS puts it in the 70th percentile. Fixed versions are out.

CVSS 3.16.5MediumEPSS percentile70th1.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix4 products2 fixed builds listed below
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Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Cloud Foundry RoutingAffected: ≥ All, < 0.204.0Upgrade to: 0.204.0Stated by: CVE record
  • Cloud Foundry CF DeploymentAffected: ≥ All, < 13.13.0Upgrade to: 13.13.0Stated by: CVE record
  • Cloudfoundry Cf-deploymentAffected: < 13.13.0Upgrade to: 13.13.0Stated by: NVD
  • Cloudfoundry Routing-releaseAffected: < 0.204.0Upgrade to: 0.204.0Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS70th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

1.2% chance of exploitation activity in the next 30 days, which ranks it in the 70th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

4 events over 1553 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Publishedweakness classified

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Scored 6.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

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