CVE intelligence and bounded remediation

CVE-2019-1737 — Cisco Ios Xe security vulnerability

High CVSS 8.6

A vulnerability in the processing of IP Service Level Agreement (SLA) packets by Cisco IOS Software and Cisco IOS XE software could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service (DoS) condition on the affected device. The vulnerability is due to improper socket resources handling in the IP SLA responder application code. An attacker could exploit this vulnerability by sending crafted IP SLA packets to an affected device. An exploit could allow the attacker to cause an interface to become wedged, resulting in an eventual denial of service (DoS) condition on the affected device.

Severity
High
CVSS
8.6 (3.1)
Published
2019-03-27
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-400, CWE-770

Affected products

  • cisco / ios_xe / 3.2.0se
  • cisco / ios_xe / 3.2.1se
  • cisco / ios_xe / 3.2.2se
  • cisco / ios_xe / 3.2.3se
  • cisco / ios_xe / 3.3.0se
  • cisco / ios_xe / 3.3.0xo

Showing 6 representative product identities from 615 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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