Memory Leak DoS in Cisco IOS and IOS XE (CVE-2018-0158) Threatens Network Devices
What It Is — A memory‑leak flaw in the IKEv1 implementation of Cisco IOS and IOS XE can be triggered remotely, causing the device to exhaust memory and reload, resulting in denial‑of‑service.
Exploitability — The vulnerability is publicly disclosed (CVE‑2018‑0158) and can be exploited without authentication; no public exploit code is required, but the attack vector is trivial.
Affected Products — Cisco IOS Software and Cisco IOS XE Software across a range of router and switch platforms.
Why It Matters for Trust & Control Assurance
- Continuous control monitoring must capture patch‑level evidence to prove timely remediation of known flaws.
- Mapping this vulnerability to the “Vulnerability Management” control objective provides a single audit artifact that satisfies multiple frameworks (e.g., NIST CSF, ISO 27001).
- Demonstrable evidence of remediation strengthens the trust posture demanded by enterprise buyers during security reviews.
Recommended Actions —
- Verify that all Cisco IOS/IOS XE devices are upgraded to a version that includes the CVE‑2018‑0158 fix.
- Deploy automated configuration and patch compliance monitoring to collect immutable evidence of remediation.
- Record remediation steps in your control evidence repository to support audit readiness.
Source: CISA KEV – CVE‑2018‑0158