Security readout for executives and security teams
Plain-English summary
Cloud Foundry deployments could let a normal developer claim routes that should belong to platform system components. In affected configurations, that developer’s app could receive requests intended for trusted infrastructure. This is high risk because it could affect confidentiality, integrity, and availability of platform traffic.
Executive priority
Treat this as a high-priority platform configuration and patching issue. It affects trust boundaries inside Cloud Foundry and could allow tenant or developer apps to intercept sensitive platform traffic in vulnerable deployments.
Technical view
CVE-2020-5417 affects Cloud Foundry CAPI Cloud Controller before 1.97.0 when an app domain is also the system domain, including the default CF Deployment manifest. Low-privileged developers could claim sensitive routes, causing traffic expected for system components to be handled by their app. CVSS is 8.5 high with changed scope.
Likely exposure
Exposure is most likely in Cloud Foundry environments running CAPI before 1.97.0 and using a shared app and system domain. The supplied sources do not prove exposure for every CF Deployment; validation depends on deployed CAPI version and route/domain configuration.
Exploitation context
The supplied bundle does not indicate known active exploitation, and KEV is false. Exploitation requires developer-level access and the vulnerable shared-domain configuration. The impact is serious because misrouted system traffic could expose or disrupt sensitive platform functions.
Researcher notes
The key exposure predicate is CAPI before 1.97.0 plus shared app and system domain. The bundle does not name specific sensitive routes, exploitation in the wild, or detailed compensating controls. Avoid assuming additional affected products beyond Cloud Foundry CAPI and CF Deployment.
Mitigation direction
- Upgrade Cloud Foundry CAPI Cloud Controller to 1.97.0 or later.
- Review the Cloud Foundry advisory before changing domain or route architecture.
- Identify deployments where app domains and system domains are shared.
- Remove unauthorized routes that overlap with platform-sensitive routing expectations.
- Prioritize production foundations and multi-tenant developer environments first.
Validation and detection
- Inventory Cloud Foundry CAPI versions across all foundations.
- Check whether any app domain is also configured as the system domain.
- Audit route mappings for unexpected ownership by developer apps.
- Confirm no developer app is receiving traffic intended for system components.
- Document findings and remediation status per Cloud Foundry foundation.
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-732: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-5417 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
- 8.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/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:H/PR:L/UI:N/S:C/C:H/I:H/A:H1.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.5HighVector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cloudfoundry.org/blog/cve-2020-5417CVE 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.
Incorrect Permission Assignment for Critical Resource
Incorrect Permission Assignment for Critical Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.