CVE intelligence and bounded remediation

CVE-2018-0179 — Cisco IOS Software Denial-of-Service Vulnerability

High CVSS 7.1 CISA KEV

Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in a denial of service (DoS) condition. These vulnerabilities affect Cisco devices that are running Cisco IOS Software Release 15.4(2)T, 15.4(3)M, or 15.4(2)CG and later. Cisco Bug IDs: CSCuy32360, CSCuz60599.

Severity
High
CVSS
7.1 (2.0)
Published
2018-03-28
CISA KEV
Known exploited
Ecosystem
operating-system
Weaknesses
CWE-399

Affected products

  • cisco / ios / 15.3(00.00.19)sy
  • cisco / ios / 15.4(01)ia001.100
  • cisco / ios / 15.6(01.22)t
  • cisco / ios / 15.4(03)m4.1
  • cisco / ios / 15.4(2)cg
  • cisco / ios / 15.4(2)t

Showing 6 representative product identities from 8 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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