CVE-2020-11899: Treck TCP/IP Stack IPv6 Out‑of‑Bounds Read Vulnerability
What It Is — The Treck TCP/IP stack contains an out‑of‑bounds read flaw in its IPv6 implementation that can be triggered by crafted packets. The defect may allow an attacker to read memory contents from the affected device.
Exploitability — No public exploit has been released, but the vulnerability is remotely triggerable and carries a CVSS 3.1 base score of 7.5 (High).
Affected Products — All versions of the Treck TCP/IP stack that include the vulnerable IPv6 code (commonly embedded in IoT, industrial controllers, and networking appliances).
Why It Matters for Trust & Control Assurance
- Vulnerability Management – Demonstrating that you have a continuous process to inventory third‑party components, detect known CVEs, and apply patches is a core control that maps to many frameworks (e.g., NIST CSF Identify and Protect).
- Evidence of Due Diligence – Maintaining up‑to‑date SBOMs and patch‑status logs provides defensible audit evidence that you are actively managing supply‑chain risk.
- Defensible Audit Trail – When regulators or customers request proof of remediation, documented remediation workflows and change‑control records satisfy control‑objective expectations for “timely vulnerability remediation.”
Recommended Actions
- Inventory – Use an automated SBOM tool to confirm whether the Treck stack is present in any of your assets.
- Patch – Apply the vendor‑supplied fix (or upgrade to a non‑vulnerable version) immediately.
- Monitor – Enable logging of IPv6 traffic anomalies and set alerts for unexpected packet patterns that could indicate exploitation attempts.
- Document – Record the remediation steps in your change‑management system to create audit‑ready evidence.
Source: CISA KEV – CVE‑2020‑11899