# CVE-2018-0381: Cisco Aironet 1560, 1800, 2800, and 3800 Series Access Points Denial of Service Vulnerability

> An authenticated adjacent attacker can cause a denial of service on Cisco Aironet Access Points by triggering a deadlock condition via specific traffic patterns.

- **Severity:** Medium 5.8 (`CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Oct 2018
- **Updated:** 26 Nov 2024
- **Also known as:** GHSA-f5q5-9x4v-vx22

## What is CVE-2018-0381?

CVE-2018-0381 is a medium-severity denial of service vulnerability in Cisco Aironet Access Points, published on 17 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-667 (Improper Locking), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2018-0381?

It affects 1 product.


Products: Cisco Aironet Access Points.

## How do I fix CVE-2018-0381?

No fix has been published for CVE-2018-0381 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-0381 being exploited?

There is no known exploitation of CVE-2018-0381 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-0381 and fix it if it is affected.

What it is: CVE-2018-0381 is a medium-severity denial of service vulnerability in Cisco Aironet Access Points, published on 17 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-0381 in the wild and no public exploit code.

Affected product: Cisco Aironet Access Points. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-0381/ (Markdown: https://insights.sbomify.com/CVE-2018-0381/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0381
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-0381
- OSV: https://osv.dev/vulnerability/CVE-2018-0381

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-0381/
Summaries are generated and may contain mistakes; the official description above is the record.