CVE intelligence and bounded remediation

CVE-2016-6437 — Cisco Wide Area Application Services security vulnerability

High CVSS 7.1

A vulnerability in the SSL session cache management of Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to high consumption of disk space. The user would see a performance degradation. More Information: CSCva03095. Known Affected Releases: 5.3(5), 6.1(1), 6.2(1). Known Fixed Releases: 5.3(5g)1, 6.2(2.32).

Severity
High
CVSS
7.1 (2.0)
Published
2016-10-27
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-399

Affected products

  • cisco / wide_area_application_services / 5.3.1
  • cisco / wide_area_application_services / 5.3.3
  • cisco / wide_area_application_services / 5.3.5
  • cisco / wide_area_application_services / 5.3.5a
  • cisco / wide_area_application_services / 5.3.5b
  • cisco / wide_area_application_services / 5.3.5c

Showing 6 representative product identities from 13 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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