# CVE-2020-3375: Cisco SD-WAN Solution Software Buffer Overflow Vulnerability

> Unauthenticated remote attackers can exploit a buffer overflow in Cisco SD-WAN vManage to execute commands as root, read data, and modify the system.

- **Severity:** Critical 9.8 (`CVSS:3.0/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:** 31 Jul 2020
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-76f8-hj3g-qcfw

## What is CVE-2020-3375?

CVE-2020-3375 is a critical memory corruption vulnerability in Cisco SD-WAN vManage, published on 31 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access, make changes to the system that they are not authorized to make, and execute commands on an affected system with privileges of the root user.

Weakness: CWE-20 (Improper Input Validation), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-3375?

It affects 2 products.


Products: Cisco Ios Xe Sd-Wan, Cisco Sd-Wan.

## How do I fix CVE-2020-3375?

No fix has been published for CVE-2020-3375 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3375 being exploited?

There is no known exploitation of CVE-2020-3375 in the wild and no public exploit code.

## Other vulnerabilities in Cisco SD-WAN vManage

- [CVE-2021-34727](https://insights.sbomify.com/CVE-2021-34727/): Cisco IOS XE SD-WAN 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-2023-20035](https://insights.sbomify.com/CVE-2023-20035/): Cisco IOS XE SD-WAN Software Command Injection Vulnerability (high 7.8)
- [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-2020-3375 and fix it if it is affected.

What it is: CVE-2020-3375 is a critical memory corruption vulnerability in Cisco SD-WAN vManage, published on 31 Jul 2020. 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-2020-3375 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-2020-3375/ (Markdown: https://insights.sbomify.com/CVE-2020-3375/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3375
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3375
- OSV: https://osv.dev/vulnerability/CVE-2020-3375

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-3375/
Summaries are generated and may contain mistakes; the official description above is the record.