# CVE-2023-20056: Cisco Access Point Software Denial of Service Vulnerability

> An authenticated local attacker can cause a denial of service on Cisco access points by submitting crafted input to the management CLI.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:L/AC:L/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:** 23 Mar 2023
- **Updated:** 25 Oct 2024
- **Also known as:** GHSA-qf58-8wfv-957j

## What is CVE-2023-20056?

CVE-2023-20056 is a medium-severity command injection vulnerability in Cisco Ios Xe, published on 23 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to cause an affected device to reload spontaneously, resulting in a DoS condition.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2023-20056?

It affects 3 products.


Products: Cisco Aironet Access Point Software, Cisco Ios Xe, Cisco Wireless Lan Controller Software.

## How do I fix CVE-2023-20056?

No fix has been published for CVE-2023-20056 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-20056 being exploited?

There is no known exploitation of CVE-2023-20056 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios Xe

- [CVE-2017-3831](https://insights.sbomify.com/CVE-2017-3831/): Auth bypass in Cisco Mobility Express 1800 Access Point Series (critical 9.8)
- [CVE-2022-20622](https://insights.sbomify.com/CVE-2022-20622/): Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability (high 8.6)
- [CVE-2018-0234](https://insights.sbomify.com/CVE-2018-0234/): Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points (high 8.6)
- [CVE-2016-1419](https://insights.sbomify.com/CVE-2016-1419/): Denial of service in n/a (high 8.1)
- [CVE-2016-6362](https://insights.sbomify.com/CVE-2016-6362/): Privilege escalation in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20056 and fix it if it is affected.

What it is: CVE-2023-20056 is a medium-severity command injection vulnerability in Cisco Ios Xe, published on 23 Mar 2023. 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-2023-20056 in the wild and no public exploit code.

Affected product: Cisco Ios Xe. 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-2023-20056/ (Markdown: https://insights.sbomify.com/CVE-2023-20056/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20056
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20056
- OSV: https://osv.dev/vulnerability/CVE-2023-20056

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20056/
Summaries are generated and may contain mistakes; the official description above is the record.