# CVE-2020-3437: Cisco SD-WAN vManage Software Information Disclosure Vulnerability

> Authenticated attackers can read arbitrary files on the underlying filesystem via the web management interface of Cisco SD-WAN vManage.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jul 2020
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-hrwv-7vp5-r8pf

## What is CVE-2020-3437?

CVE-2020-3437 is a medium-severity path traversal vulnerability in Cisco SD-WAN vManage, published on 16 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to read arbitrary files on the underlying filesystem of the device. The vulnerability is due to insufficient file scope limiting. An attacker could exploit this vulnerability by creating a specific file reference on the filesystem and then accessing it through the web-based management interface. A successful exploit could allow the attacker to read arbitrary files from the filesystem of the underlying operating system.

Weakness: CWE-59 (Improper Link Resolution Before File Access)

## Which versions are affected by CVE-2020-3437?

It affects 1 product.


Products: Cisco Sd-Wan Firmware.

## How do I fix CVE-2020-3437?

No fix has been published for CVE-2020-3437 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3437 being exploited?

There is no known exploitation of CVE-2020-3437 in the wild and no public exploit code.

## Other vulnerabilities in Cisco SD-WAN vManage

- [CVE-2020-3381](https://insights.sbomify.com/CVE-2020-3381/): Cisco SD-WAN vManage Software Directory Traversal Vulnerability (high 8.8)
- [CVE-2020-3115](https://insights.sbomify.com/CVE-2020-3115/): Cisco SD-WAN Solution Local Privilege Escalation Vulnerability (high 8.8)
- [CVE-2019-1626](https://insights.sbomify.com/CVE-2019-1626/): Cisco SD-WAN Solution Privilege Escalation Vulnerability (high 8.8)
- [CVE-2020-3351](https://insights.sbomify.com/CVE-2020-3351/): Cisco SD-WAN Solution Software Denial of Service Vulnerability (high 8.6)
- [CVE-2020-3369](https://insights.sbomify.com/CVE-2020-3369/): Cisco SD-WAN vEdge Routers Denial of Service Vulnerability (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3437 and fix it if it is affected.

What it is: CVE-2020-3437 is a medium-severity path traversal vulnerability in Cisco SD-WAN vManage, published on 16 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3437 in the wild and no public exploit code.

Affected product: Cisco SD-WAN vManage. 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-2020-3437/ (Markdown: https://insights.sbomify.com/CVE-2020-3437/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3437
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3437
- OSV: https://osv.dev/vulnerability/CVE-2020-3437

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3437/
Summaries are generated and may contain mistakes; the official description above is the record.