CVE-2018-0179: Cisco IOS Software Denial‑of‑Service Vulnerability Allows Unauthenticated Remote Reload
What It Is — A flaw in the Login Enhancements (Login Block) feature of Cisco IOS Software can be triggered by an unauthenticated, remote attacker to force the device to reload, causing a denial‑of‑service condition.
Exploitability — The attack requires only network‑level access to the device’s management interface; no authentication or privileged credentials are needed. No public exploit code has been released, but the vulnerability is trivial to reproduce. CVSS v3.1 base score: 7.5 (High).
Affected Products — Cisco IOS Software across multiple release trains (router and switch platforms) that include the Login Block feature.
Why It Matters for Trust & Control Assurance
- Continuous monitoring of firmware and software versions is essential to prove timely remediation of known flaws.
- Patch‑management and change‑control evidence satisfy control objectives for system integrity and availability across many frameworks (e.g., NIST CSF “Protect” function).
- Demonstrable readiness to address DoS‑type weaknesses reassures auditors and enterprise buyers that service continuity risks are being actively managed.
Recommended Actions
- Identify all Cisco IOS devices in scope and verify the running version against Cisco’s security advisory for CVE‑2018‑0179.
- Apply the vendor‑provided patch or upgrade to a non‑vulnerable release immediately.
- Incorporate automated vulnerability scanning of network infrastructure into your continuous compliance program and retain remediation evidence in your audit repository.
Source: CISA KEV – CVE‑2018‑0179