CVE intelligence and bounded remediation

CVE-2018-0373 — Cisco Anyconnect Secure Mobility Client security vulnerability

Medium CVSS 5.5

A vulnerability in vpnva-6.sys for 32-bit Windows and vpnva64-6.sys for 64-bit Windows of Cisco AnyConnect Secure Mobility Client for Windows Desktop could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability is due to improper validation of user-supplied data. An attacker could exploit this vulnerability by sending a malicious request to the application. A successful exploit could allow the attacker to cause a DoS condition on the affected system. Cisco Bug IDs: CSCvj47654.

Severity
Medium
CVSS
5.5 (3.0)
Published
2018-06-21
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-20

Affected products

  • cisco / anyconnect_secure_mobility_client / 4.5(58)
  • cisco / anyconnect_secure_mobility_client / 4.5(1044)
  • cisco / anyconnect_secure_mobility_client / 4.5(2033)
  • cisco / anyconnect_secure_mobility_client / 4.5(2036)
  • cisco / anyconnect_secure_mobility_client / 4.5(3040)
  • cisco / anyconnect_secure_mobility_client / 4.5(4029)

Showing 6 representative product identities from 9 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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