# CVE-2020-11634: Code injection in n/a

> A local attacker can execute arbitrary code with SYSTEM privileges via DLL hijacking in the Zscaler Client Connector for Windows.

- **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:** 15 Jul 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7mch-783h-q63m

## What is CVE-2020-11634?

CVE-2020-11634 is a high-severity code injection vulnerability in n/a, published on 15 Jul 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

The Zscaler Client Connector for Windows prior to 2.1.2.105 had a DLL hijacking vulnerability caused due to the configuration of OpenSSL. A local adversary may be able to execute arbitrary code in the SYSTEM context.

Weakness: CWE-427 (Uncontrolled Search Path Element)

## Which versions are affected by CVE-2020-11634?

It affects 1 product.


Products: Zscaler Client Connector.

## How do I fix CVE-2020-11634?

No fix has been published for CVE-2020-11634 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-11634 being exploited?

There is no known exploitation of CVE-2020-11634 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-11633](https://insights.sbomify.com/CVE-2020-11633/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-23463](https://insights.sbomify.com/CVE-2024-23463/): Anti-Tampering bypass via Repair App functionality (high 8.8)
- [CVE-2023-28804](https://insights.sbomify.com/CVE-2023-28804/): Linux ZCC allows unsigned updates, allowing elevated Code Execution (high 8.2)
- [CVE-2023-28799](https://insights.sbomify.com/CVE-2023-28799/): Open redirect in Client Connector (high 8.2)
- [CVE-2023-28800](https://insights.sbomify.com/CVE-2023-28800/): Output encoding missing in redrurl parameter (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-11634 and fix it if it is affected.

What it is: CVE-2020-11634 is a high-severity code injection vulnerability in n/a, published on 15 Jul 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-2020-11634 in the wild and no public exploit code.

Affected product: n/a. 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-2020-11634/ (Markdown: https://insights.sbomify.com/CVE-2020-11634/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-11634
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-11634
- OSV: https://osv.dev/vulnerability/CVE-2020-11634

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-11634/
Summaries are generated and may contain mistakes; the official description above is the record.