CVE intelligence and bounded remediation

CVE-2018-0381 — Cisco Aironet Access Points security vulnerability

Medium CVSS 6.8

A vulnerability in the Cisco Aironet Series Access Points (APs) software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to a deadlock condition that may occur when an affected AP attempts to dequeue aggregated traffic that is destined to an attacker-controlled wireless client. An attacker who can successfully transition between multiple Service Set Identifiers (SSIDs) hosted on the same AP while replicating the required traffic patterns could trigger the deadlock condition. A watchdog timer that detects the condition will trigger a reload of the device, resulting in a DoS condition while the device restarts.

Severity
Medium
CVSS
6.8 (3.1)
Published
2018-10-17
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-400, CWE-667

Affected products

  • cisco / aironet_access_points / 8.2(166.0)
  • cisco / aironet_access_points / 8.2(167.3)
  • cisco / aironet_access_points / 8.3(133.0)
  • cisco / aironet_access_points / 8.3(141.10)
  • cisco / aironet_access_points / 8.5(120.0)
  • cisco / aironet_access_points / 8.7(1.96)

Showing 6 representative product identities from 8 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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