CVE intelligence and bounded remediation

CVE-2024-20474 — Cisco Anyconnect Secure Mobility Client security vulnerability

Medium CVSS 6.5

A vulnerability in Internet Key Exchange version 2 (IKEv2) processing of Cisco Secure Client Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of Cisco Secure Client. This vulnerability is due to an integer underflow condition. An attacker could exploit this vulnerability by sending a crafted IKEv2 packet to an affected system. A successful exploit could allow the attacker to cause Cisco Secure Client Software to crash, resulting in a DoS condition on the client software. Note: Cisco Secure Client Software releases 4.10 and earlier were known as Cisco AnyConnect Secure Mobility Client.

Severity
Medium
CVSS
6.5 (3.1)
Published
2024-10-23
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-191

Affected products

  • cisco / anyconnect_secure_mobility_client / 4.9.00086
  • cisco / anyconnect_secure_mobility_client / 4.9.01095
  • cisco / anyconnect_secure_mobility_client / 4.9.02028
  • cisco / anyconnect_secure_mobility_client / 4.9.03047
  • cisco / anyconnect_secure_mobility_client / 4.9.03049
  • cisco / anyconnect_secure_mobility_client / 4.9.04043

Showing 6 representative product identities from 38 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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