# CVE-2018-0434: Cisco SD-WAN Solution Certificate Validation Vulnerability

> An unauthenticated remote attacker can bypass certificate validation in Cisco SD-WAN Zero Touch Provisioning to conduct man-in-the-middle attacks and decrypt confidential data.

- **Severity:** High 7.4 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2018
- **Updated:** 26 Nov 2024
- **Also known as:** GHSA-6qq2-f6xc-778x

## What is CVE-2018-0434?

CVE-2018-0434 is a high-severity vulnerability in Cisco SD-WAN Solution, published on 5 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Zero Touch Provisioning feature of the Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data by using an invalid certificate. The vulnerability is due to insufficient certificate validation by the affected software. An attacker could exploit this vulnerability by supplying a crafted certificate to an affected device. A successful exploit could allow the attacker to conduct man-in-the-middle attacks to decrypt confidential information on user connections to the affected software.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2018-0434?

It affects 5 products.


Products: Cisco Vedge 1000 Firmware, Cisco Vedge 100 Firmware, Cisco Vedge 2000 Firmware, Cisco Vedge 5000 Firmware, Cisco Vmanage Network Management System.

## How do I fix CVE-2018-0434?

No fix has been published for CVE-2018-0434 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-0434 being exploited?

There is no known exploitation of CVE-2018-0434 in the wild and no public exploit code.

## Other vulnerabilities in Cisco SD-WAN Solution

- [CVE-2018-0432](https://insights.sbomify.com/CVE-2018-0432/): Cisco SD-WAN Solution Privilege Escalation Vulnerability (high 8.8)
- [CVE-2021-1509](https://insights.sbomify.com/CVE-2021-1509/): Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities (high 7.5)
- [CVE-2021-1510](https://insights.sbomify.com/CVE-2021-1510/): Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities (high 7.5)
- [CVE-2021-1511](https://insights.sbomify.com/CVE-2021-1511/): Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-0434 and fix it if it is affected.

What it is: CVE-2018-0434 is a high-severity vulnerability in Cisco SD-WAN Solution, published on 5 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-0434 in the wild and no public exploit code.

Affected product: Cisco SD-WAN Solution. 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-2018-0434/ (Markdown: https://insights.sbomify.com/CVE-2018-0434/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0434
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-0434
- OSV: https://osv.dev/vulnerability/CVE-2018-0434

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-0434/
Summaries are generated and may contain mistakes; the official description above is the record.