# CVE-2018-6234: Information disclosure in Trend Micro Maximum Security

> A local attacker with low privileges can disclose sensitive information via an out-of-bounds read in the Trend Micro Maximum Security driver.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 May 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-p596-x7gf-xq3c

## What is CVE-2018-6234?

CVE-2018-6234 is a medium-severity vulnerability in Trend Micro Maximum Security, published on 25 May 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An Out-of-Bounds Read Information Disclosure vulnerability in Trend Micro Maximum Security (Consumer) 2018 could allow a local attacker to disclose sensitive information on vulnerable installations due to a flaw within processing of IOCTL 0x222814 by the tmnciesc.sys driver. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2018-6234?

It affects 4 products.


Products: Trendmicro Antivirus\+, Trendmicro Internet Security, Trendmicro Maximum Security, Trendmicro Premium Security.

## How do I fix CVE-2018-6234?

No fix has been published for CVE-2018-6234 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-6234 being exploited?

There is no known exploitation of CVE-2018-6234 in the wild and no public exploit code.

## Other vulnerabilities in Trend Micro Maximum Security

- [CVE-2018-6232](https://insights.sbomify.com/CVE-2018-6232/): Memory corruption in Trend Micro Maximum Security (high 7.8)
- [CVE-2018-6233](https://insights.sbomify.com/CVE-2018-6233/): Memory corruption in Trend Micro Maximum Security (high 7.8)
- [CVE-2018-6235](https://insights.sbomify.com/CVE-2018-6235/): Memory corruption in Trend Micro Maximum Security (high 7.8)
- [CVE-2018-6236](https://insights.sbomify.com/CVE-2018-6236/): Race condition in Trend Micro Maximum Security (high 7.0)
- [CVE-2017-5565](https://insights.sbomify.com/CVE-2017-5565/): Code injection in n/a (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-6234 and fix it if it is affected.

What it is: CVE-2018-6234 is a medium-severity vulnerability in Trend Micro Maximum Security, published on 25 May 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-6234 in the wild and no public exploit code.

Affected product: Trend Micro Maximum Security. 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-2018-6234/ (Markdown: https://insights.sbomify.com/CVE-2018-6234/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-6234
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-6234
- OSV: https://osv.dev/vulnerability/CVE-2018-6234

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-6234/
Summaries are generated and may contain mistakes; the official description above is the record.