Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated remote attacker crash Cloud Foundry's Gorouter by sending a forged route service request with an invalid nonce. The business risk is service disruption, not data theft, based on the published CVSS impact.
Executive priority
Treat this as a high-priority availability issue for affected Cloud Foundry environments. It does not indicate data compromise, but unauthenticated remote crash potential can disrupt application traffic and customer-facing services.
Technical view
Cloud Foundry Routing before 0.193.0 insufficiently validates nonce input. An invalid nonce in a forged HTTP route service request can trigger a Gorouter panic and crash. The CVSS 3.0 score is 8.6, with network reachability, low complexity, no privileges, and high availability impact.
Likely exposure
Exposure is limited to Cloud Foundry deployments running Routing versions before 0.193.0. Systems using Gorouter for route service traffic are the relevant focus. The source bundle does not identify other affected products or downstream distributions.
Exploitation context
The sources describe remote unauthenticated exploitation causing Gorouter crashes. CISA KEV status is false in the bundle, and no cited source here confirms active exploitation in the wild.
Researcher notes
This is CWE-20 improper input validation in nonce handling. Public details support denial-of-service impact through Gorouter panic, but the bundle does not provide exploit telemetry, detailed root cause code, or compensating controls beyond upgrading.
Mitigation direction
- Upgrade Cloud Foundry Routing to version 0.193.0 or later.
- Review the Cloud Foundry advisory for deployment-specific upgrade guidance.
- Prioritize internet-facing or untrusted-network Gorouter deployments.
- Monitor Gorouter availability during rollout and verify stable routing after upgrade.
Validation and detection
- Inventory Cloud Foundry Routing and Gorouter versions across environments.
- Confirm every affected deployment runs Routing 0.193.0 or later.
- Review Gorouter crash or panic logs around route service request handling.
- Check whether route services are enabled and exposed in each deployment.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2019-11289 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cloudfoundry.org/blog/cve-2019-11289CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.