# CVE-2023-5627: Incorrect Implementation of Authentication Algorithm Vulnerability

> Attackers can bypass authentication to gain unauthorized access to the web service of Moxa NPort 6000 devices.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Nov 2023
- **Updated:** 5 Sep 2024
- **Also known as:** GHSA-7477-pxvj-g72x

## What is CVE-2023-5627?

CVE-2023-5627 is a high-severity authentication bypass vulnerability in Moxa NPort 6000 Series, published on 1 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in NPort 6000 Series, making the authentication mechanism vulnerable. This vulnerability arises from the incorrect implementation of sensitive information protection, potentially allowing malicious users to gain unauthorized access to the web service.

Weakness: CWE-287 (Improper Authentication), CWE-327 (Use of a Broken or Risky Cryptographic Algorithm), CWE-303 (Incorrect Implementation of Authentication Algorithm), CWE-257 (Storing Passwords in a Recoverable Format)

## Which versions are affected by CVE-2023-5627?

It affects 27 products.


Products: Moxa Nport 6150-T Firmware, Moxa Nport 6150 Firmware, Moxa Nport 6250-M-Sc-T Firmware, Moxa Nport 6250-M-Sc Firmware, Moxa Nport 6250-S-Sc-T Firmware, Moxa Nport 6250-S-Sc Firmware, Moxa Nport 6250-T Firmware, Moxa Nport 6250 Firmware, Moxa Nport 6450-T Firmware, Moxa Nport 6450 Firmware, Moxa Nport 6610-16-48v Firmware, Moxa Nport 6610-16 Firmware, Moxa Nport 6610-32-48v Firmware, Moxa Nport 6610-32 Firmware, Moxa Nport 6610-8-48v Firmware, Moxa Nport 6610-8 Firmware, Moxa Nport 6650-16-48v Firmware, Moxa Nport 6650-16-Hv-T Firmware, Moxa Nport 6650-16-T Firmware, Moxa Nport 6650-16 Firmware and 7 more.

## How do I fix CVE-2023-5627?

No fix has been published for CVE-2023-5627 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-5627 being exploited?

There is no known exploitation of CVE-2023-5627 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5627 and fix it if it is affected.

What it is: CVE-2023-5627 is a high-severity authentication bypass vulnerability in Moxa NPort 6000 Series, published on 1 Nov 2023. 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-2023-5627 in the wild and no public exploit code.

Affected product: Moxa NPort 6000 Series. 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-2023-5627/ (Markdown: https://insights.sbomify.com/CVE-2023-5627/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5627
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5627
- OSV: https://osv.dev/vulnerability/CVE-2023-5627

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5627/
Summaries are generated and may contain mistakes; the official description above is the record.