# CVE-2018-5441: Other in PHOENIX CONTACT mGuard

> Attackers can modify firmware update packages due to improper integrity checks, potentially leading to unauthorized code execution on PHOENIX CONTACT mGuard devices.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 30 Jan 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-xgqm-f6fc-576h

## What is CVE-2018-5441?

CVE-2018-5441 is a high-severity vulnerability in PHOENIX CONTACT mGuard, published on 30 Jan 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An Improper Validation of Integrity Check Value issue was discovered in PHOENIX CONTACT mGuard firmware versions 7.2 to 8.6.0. mGuard devices rely on internal checksums for verification of the internal integrity of the update packages. Verification may not always be performed correctly, allowing an attacker to modify firmware update packages.

Weakness: CWE-20 (Improper Input Validation), CWE-354 (Improper Validation of Integrity Check Value)

## Which versions are affected by CVE-2018-5441?

It affects 23 products.


Products: Phoenixcontact Mguard Centerport Firmware, Phoenixcontact Mguard Core Tx Vpn Firmware, Phoenixcontact Mguard Delta Tx\/Tx Firmware, Phoenixcontact Mguard Delta Tx\/Tx Vpn Firmware, Phoenixcontact Mguard Gt\/Gt Firmware, Phoenixcontact Mguard Gt\/Gt Vpn Firmware, Phoenixcontact Mguard Pci4000 Vpn Firmware, Phoenixcontact Mguard Pcie4000 Vpn Firmware, Phoenixcontact Mguard Rs2000 3g Vpn Firmware, Phoenixcontact Mguard Rs2000 4g Vpn Firmware, Phoenixcontact Mguard Rs2000 Tx\/Tx-B Firmware, Phoenixcontact Mguard Rs2000 Tx\/Tx Vpn Firmware, Phoenixcontact Mguard Rs2005 Tx Vpn Firmware, Phoenixcontact Mguard Rs4000 3g Vpn Firmware, Phoenixcontact Mguard Rs4000 4g Vpn Firmware, Phoenixcontact Mguard Rs4000 Tx\/Tx-P Firmware, Phoenixcontact Mguard Rs4000 Tx\/Tx Firmware, Phoenixcontact Mguard Rs4000 Tx\/Tx Vpn-M Firmware, Phoenixcontact Mguard Rs4000 Tx\/Tx Vpn Firmware, Phoenixcontact Mguard Rs4004 Tx\/Dtx Firmware and 3 more.

## How do I fix CVE-2018-5441?

No fix has been published for CVE-2018-5441 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-5441 being exploited?

There is no known exploitation of CVE-2018-5441 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-5441 and fix it if it is affected.

What it is: CVE-2018-5441 is a high-severity vulnerability in PHOENIX CONTACT mGuard, published on 30 Jan 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-2018-5441 in the wild and no public exploit code.

Affected product: PHOENIX CONTACT mGuard. 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-2018-5441/ (Markdown: https://insights.sbomify.com/CVE-2018-5441/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-5441
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-5441
- OSV: https://osv.dev/vulnerability/CVE-2018-5441

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-5441/
Summaries are generated and may contain mistakes; the official description above is the record.