# CVE-2021-20047: Other in SonicWall Global VPN Client

> A local attacker can exploit DLL search order hijacking in the SonicWall Global VPN Client to achieve remote code execution on the target system.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Dec 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-j8rh-gjh8-236w

## What is CVE-2021-20047?

CVE-2021-20047 is a high-severity vulnerability in SonicWall Global VPN Client, published on 8 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

SonicWall Global VPN client version 4.10.6 (32-bit and 64-bit) and earlier have a DLL Search Order Hijacking vulnerability. Successful exploitation via a local attacker could result in remote code execution in the target system.

Weakness: CWE-427 (Uncontrolled Search Path Element)

## Which versions are affected by CVE-2021-20047?

It affects 1 product.


Products: Sonicwall Global Vpn Client.

## How do I fix CVE-2021-20047?

No fix has been published for CVE-2021-20047 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20047 being exploited?

There is no known exploitation of CVE-2021-20047 in the wild and no public exploit code.

## Other vulnerabilities in SonicWall Global VPN Client

- [CVE-2007-6273](https://insights.sbomify.com/CVE-2007-6273/): Other in n/a (critical 9.3)
- [CVE-2020-5145](https://insights.sbomify.com/CVE-2020-5145/): Other in SonicWall Global VPN Client (high 8.6)
- [CVE-2021-20051](https://insights.sbomify.com/CVE-2021-20051/): Other in SonicWall Global VPN Client (high 7.8)
- [CVE-2021-20037](https://insights.sbomify.com/CVE-2021-20037/): Privilege escalation in SonicWall Global VPN Client (high 7.8)
- [CVE-2020-5144](https://insights.sbomify.com/CVE-2020-5144/): Privilege escalation in SonicWall Global VPN Client (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20047 and fix it if it is affected.

What it is: CVE-2021-20047 is a high-severity vulnerability in SonicWall Global VPN Client, published on 8 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-20047 in the wild and no public exploit code.

Affected product: SonicWall Global VPN Client. 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-2021-20047/ (Markdown: https://insights.sbomify.com/CVE-2021-20047/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20047
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20047
- OSV: https://osv.dev/vulnerability/CVE-2021-20047

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-20047/
Summaries are generated and may contain mistakes; the official description above is the record.