# CVE-2018-15387: Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability

> An unauthenticated remote attacker can bypass certificate validation to deploy a crafted system image on Cisco SD-WAN devices.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **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-jhq5-xcpf-vrwm

## What is CVE-2018-15387?

CVE-2018-15387 is a critical 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 Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to bypass certificate validation on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by supplying a system image signed with a crafted certificate to an affected device, bypassing the certificate validation. An exploit could allow an attacker to deploy a crafted system image.

Weakness: CWE-295 (Improper Certificate Validation), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-15387?

It affects 1 product.


Products: Cisco Sd-Wan.

## How do I fix CVE-2018-15387?

No fix has been published for CVE-2018-15387 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-15387 being exploited?

There is no known exploitation of CVE-2018-15387 in the wild and no public exploit code.

## Other vulnerabilities in Cisco SD-WAN Solution

- [CVE-2020-3374](https://insights.sbomify.com/CVE-2020-3374/): Cisco SD-WAN vManage Software Authorization Bypass Vulnerability (critical 9.9)
- [CVE-2019-1624](https://insights.sbomify.com/CVE-2019-1624/): Cisco SD-WAN Solution Command Injection Vulnerability (high 8.8)
- [CVE-2019-1650](https://insights.sbomify.com/CVE-2019-1650/): Cisco SD-WAN Solution Arbitrary File Overwrite Vulnerability (high 8.8)
- [CVE-2020-3180](https://insights.sbomify.com/CVE-2020-3180/): Cisco SD-WAN Solution Software Static Credentials Vulnerability (high 8.4)
- [CVE-2019-1647](https://insights.sbomify.com/CVE-2019-1647/): Cisco SD-WAN Solution Unauthorized Access Vulnerability (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15387 and fix it if it is affected.

What it is: CVE-2018-15387 is a critical 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-2018-15387 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-2018-15387/ (Markdown: https://insights.sbomify.com/CVE-2018-15387/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15387
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15387
- OSV: https://osv.dev/vulnerability/CVE-2018-15387

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-15387/
Summaries are generated and may contain mistakes; the official description above is the record.