CVE intelligence and bounded remediation

CVE-2024-20279 — Cisco Application Policy Infrastructure Controller security vulnerability

Medium CVSS 4.3

A vulnerability in the restricted security domain implementation of Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to modify the behavior of default system policies, such as quality of service (QoS) policies, on an affected system. This vulnerability is due to improper access control when restricted security domains are used to implement multi-tenancy. An attacker with a valid user account associated with a restricted security domain could exploit this vulnerability. A successful exploit could allow the attacker to read, modify, or delete child policies created under default system policies, which are implicitly used by all tenants in the fabric, resulting in disruption of network traffic. Exploitation is not possible for policies under tenants that an attacker has no authorization to access.

Severity
Medium
CVSS
4.3 (3.1)
Published
2024-08-28
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-284

Affected products

  • cisco / application_policy_infrastructure_controller / 1.1(1d)
  • cisco / application_policy_infrastructure_controller / 1.1(1j)
  • cisco / application_policy_infrastructure_controller / 1.1(1n)
  • cisco / application_policy_infrastructure_controller / 1.1(1o)
  • cisco / application_policy_infrastructure_controller / 1.1(1r)
  • cisco / application_policy_infrastructure_controller / 1.1(1s)

Showing 6 representative product identities from 221 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

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Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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