CVE intelligence and bounded remediation

CVE-2019-1750 — Cisco Ios Xe security vulnerability

High CVSS 7.4

A vulnerability in the Easy Virtual Switching System (VSS) of Cisco IOS XE Software on Catalyst 4500 Series Switches could allow an unauthenticated, adjacent attacker to cause the switches to reload. The vulnerability is due to incomplete error handling when processing Cisco Discovery Protocol (CDP) packets used with the Easy Virtual Switching System. An attacker could exploit this vulnerability by sending a specially crafted CDP packet. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Severity
High
CVSS
7.4 (3.0)
Published
2019-03-28
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-20, CWE-388

Affected products

  • cisco / ios_xe / 3.6.0ae
  • cisco / ios_xe / 3.6.0be
  • cisco / ios_xe / 3.6.0e
  • cisco / ios_xe / 3.6.1e
  • cisco / ios_xe / 3.6.2ae
  • cisco / ios_xe / 3.6.2e

Showing 6 representative product identities from 42 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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