# CVE-2018-6970: Information disclosure in VMware Horizon 6, Horizon 7, and Horizon Client

> A less-privileged user can leak information from a privileged process via an out-of-bounds read in the Message Framework library.

- **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:** 13 Aug 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-6j55-6hf8-fxvj

## What is CVE-2018-6970?

CVE-2018-6970 is a medium-severity vulnerability in VMware Horizon 6, Horizon 7, and Horizon Client, published on 13 Aug 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

VMware Horizon 6 (6.x.x before 6.2.7), Horizon 7 (7.x.x before 7.5.1), and Horizon Client (4.x.x and prior before 4.8.1) contain an out-of-bounds read vulnerability in the Message Framework library. Successfully exploiting this issue may allow a less-privileged user to leak information from a privileged process running on a system where Horizon Connection Server, Horizon Agent or Horizon Client are installed. Note: This issue doesn't apply to Horizon 6, 7 Agents installed on Linux systems or Horizon Clients installed on non-Windows systems.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2018-6970?

It affects 2 products.


Products: Vmware Horizon Client, Vmware Horizon View.

## How do I fix CVE-2018-6970?

No fix has been published for CVE-2018-6970 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-6970 being exploited?

There is no known exploitation of CVE-2018-6970 in the wild and no public exploit code.

## Other vulnerabilities in VMware Horizon 6, Horizon 7, and Horizon Client

- [CVE-2020-3961](https://insights.sbomify.com/CVE-2020-3961/): Privilege escalation in VMware Horizon Client for Windows (high 7.8)
- [CVE-2019-5543](https://insights.sbomify.com/CVE-2019-5543/): Privilege escalation in VMware Horizon Client for Windows (high 7.8)
- [CVE-2018-6964](https://insights.sbomify.com/CVE-2018-6964/): Privilege escalation in Horizon Client for Linux (high 7.8)
- [CVE-2020-3991](https://insights.sbomify.com/CVE-2020-3991/): Path traversal in VMware Horizon Client for Windows (high 7.1)
- [CVE-2021-21987](https://insights.sbomify.com/CVE-2021-21987/): Information disclosure in VMware Workstation Pro / Player (Workstation), VMware Horizon Client for Windows (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-6970 and fix it if it is affected.

What it is: CVE-2018-6970 is a medium-severity vulnerability in VMware Horizon 6, Horizon 7, and Horizon Client, published on 13 Aug 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-6970 in the wild and no public exploit code.

Affected product: VMware Horizon 6, Horizon 7, and Horizon 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-2018-6970/ (Markdown: https://insights.sbomify.com/CVE-2018-6970/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-6970
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-6970
- OSV: https://osv.dev/vulnerability/CVE-2018-6970

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-6970/
Summaries are generated and may contain mistakes; the official description above is the record.