# CVE-2023-20035: Cisco IOS XE SD-WAN Software Command Injection Vulnerability

> Authenticated local attackers can execute arbitrary commands with root privileges via insufficient input validation in the CLI.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 28 Oct 2024
- **Also known as:** GHSA-mg9g-g88j-w67g

## What is CVE-2023-20035?

CVE-2023-20035 is a high-severity command injection vulnerability in Cisco IOS XE Software, 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 CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to execute arbitrary commands with elevated privileges. This vulnerability is due to insufficient input validation by the system CLI. An attacker with privileges to run commands could exploit this vulnerability by first authenticating to an affected device using either local terminal access or a management shell interface and then submitting crafted input to the system CLI. A successful exploit could allow the attacker to execute commands on the underlying operating system with root-level privileges. An attacker with limited user privileges could use this vulnerability to gain complete control over the system. Note: For additional information about specific impacts, see the Details section of this advisory.

Weakness: CWE-146 (Improper Neutralization of Expression/Command Delimiters)

## Which versions are affected by CVE-2023-20035?

It affects 1 product.


Products: Cisco Ios Xe Sd-Wan.

## How do I fix CVE-2023-20035?

No fix has been published for CVE-2023-20035 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-20035 being exploited?

There is no known exploitation of CVE-2023-20035 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IOS XE Software

- [CVE-2021-34727](https://insights.sbomify.com/CVE-2021-34727/): Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability (critical 9.8)
- [CVE-2020-3375](https://insights.sbomify.com/CVE-2020-3375/): Cisco SD-WAN Solution Software Buffer Overflow Vulnerability (critical 9.8)
- [CVE-2021-1305](https://insights.sbomify.com/CVE-2021-1305/): Cisco SD-WAN vManage Authorization Bypass Vulnerabilities (high 8.8)
- [CVE-2020-3216](https://insights.sbomify.com/CVE-2020-3216/): Cisco IOS XE SD-WAN Software Authentication Bypass Vulnerability (medium 6.8)
- [CVE-2021-34725](https://insights.sbomify.com/CVE-2021-34725/): Cisco IOS XE SD-WAN Software Command Injection Vulnerability (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20035 and fix it if it is affected.

What it is: CVE-2023-20035 is a high-severity command injection vulnerability in Cisco IOS XE Software, 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-2023-20035 in the wild and no public exploit code.

Affected product: Cisco IOS XE Software. 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-2023-20035/ (Markdown: https://insights.sbomify.com/CVE-2023-20035/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20035
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20035
- OSV: https://osv.dev/vulnerability/CVE-2023-20035

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20035/
Summaries are generated and may contain mistakes; the official description above is the record.