Directory Traversal in VMware Tanzu Spring Cloud Config Server (CVE‑2020‑5410) Risks Arbitrary Config File Exposure
What It Is – A path‑traversal flaw in the Spring Cloud Config component of VMware Tanzu allows an attacker to request files outside the intended configuration directory, potentially retrieving arbitrary configuration files.
Exploitability – The vulnerability is remotely exploitable via crafted HTTP requests; proof‑of‑concept code is publicly available. NVD assigns a CVSS 3.1 base score of 7.5 (High).
Affected Products – VMware Tanzu Spring Cloud Config Server (all versions prior to the vendor‑released fix).
Why It Matters for Trust & Control Assurance
- Configuration Management Controls – The issue highlights gaps in secure configuration baselines and the need for continuous verification that third‑party components are hardened.
- Access‑Control Evidence – Arbitrary file access undermines the principle of least privilege; auditors will look for documented controls that restrict configuration file exposure.
- Defensible Audit Trail – Demonstrating that you have patched, monitored, and validated this component provides concrete evidence for compliance reviews and risk‑based assurance programs.
Recommended Actions
- Inventory all instances of VMware Tanzu Spring Cloud Config Server in your environment.
- Verify that each instance runs a version containing the vendor’s patch for CVE‑2020‑5410.
- Conduct a configuration‑file access review to ensure only authorized services can read sensitive configs.
- Update your secure‑configuration baseline to include directory‑traversal checks and integrate them into CI/CD pipelines.
- Log and monitor access to the Config Server endpoints for anomalous request patterns.
Source: CISA KEV – CVE‑2020‑5410