# CVE-2018-6667: McAfee Web Gateway - Authentication Bypass vulnerability

> Remote attackers can bypass authentication in the administrative interface to execute arbitrary code via JMX, requiring immediate patching.

- **Severity:** Critical 10.0 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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:** 26 Jun 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-qhv2-x36h-3gcf

## What is CVE-2018-6667?

CVE-2018-6667 is a critical authentication bypass vulnerability in McAfee Web Gateway, published on 26 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Authentication Bypass vulnerability in the administrative user interface in McAfee Web Gateway 7.8.1.0 through 7.8.1.5 allows remote attackers to execute arbitrary code via Java management extensions (JMX).

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2018-6667?

It affects 1 product.


Products: Mcafee Mcafee Web Gateway.

## How do I fix CVE-2018-6667?

No fix has been published for CVE-2018-6667 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-6667 being exploited?

There is no known exploitation of CVE-2018-6667 in the wild and no public exploit code.

## Other vulnerabilities in McAfee Web Gateway

- [CVE-2018-6677](https://insights.sbomify.com/CVE-2018-6677/): McAfee Web Gateway (MWG) - Directory Traversal vulnerability (high 7.6)
- [CVE-2019-3581](https://insights.sbomify.com/CVE-2019-3581/): McAfee Web Gateway denial of service attack due to Improper Input Validation (high 7.5)
- [CVE-2018-6678](https://insights.sbomify.com/CVE-2018-6678/): McAfee Web Gateway (MWG) - Configuration/Environment manipulation vulnerability (low 3.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-6667 and fix it if it is affected.

What it is: CVE-2018-6667 is a critical authentication bypass vulnerability in McAfee Web Gateway, published on 26 Jun 2018. 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-2018-6667 in the wild and no public exploit code.

Affected product: McAfee Web Gateway. 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-2018-6667/ (Markdown: https://insights.sbomify.com/CVE-2018-6667/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-6667
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-6667
- OSV: https://osv.dev/vulnerability/CVE-2018-6667

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-6667/
Summaries are generated and may contain mistakes; the official description above is the record.