# CVE-2019-18235: Auth bypass in Advantech Spectre RT ERT351 Versions 5.1.3 and prior

> Insufficient login authentication parameters in Advantech Spectre RT allow attackers to gain full access via brute-force password attacks.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:** 17 Mar 2021
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-pr9p-f58p-r8w8

## What is CVE-2019-18235?

CVE-2019-18235 is a critical authentication bypass vulnerability in Advantech Spectre RT ERT351 Versions 5.1.3 and prior, published on 17 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Advantech Spectre RT ERT351 Versions 5.1.3 and prior has insufficient login authentication parameters required for the web application may allow an attacker to gain full access using a brute-force password attack.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2019-18235?

It affects 1 product.


Products: Advantech Spectre Rt Ert351 Firmware.

## How do I fix CVE-2019-18235?

No fix has been published for CVE-2019-18235 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-18235 being exploited?

There is no known exploitation of CVE-2019-18235 in the wild and no public exploit code.

## Other vulnerabilities in Advantech Spectre RT ERT351 Versions 5.1.3 and prior

- [CVE-2019-18231](https://insights.sbomify.com/CVE-2019-18231/): Information disclosure in Advantech Spectre RT ERT351 (high 7.5)
- [CVE-2019-18233](https://insights.sbomify.com/CVE-2019-18233/): Cross-site scripting in Advantech Spectre RT Industrial Routers ERT351 (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-18235 and fix it if it is affected.

What it is: CVE-2019-18235 is a critical authentication bypass vulnerability in Advantech Spectre RT ERT351 Versions 5.1.3 and prior, published on 17 Mar 2021. 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-2019-18235 in the wild and no public exploit code.

Affected product: Advantech Spectre RT ERT351 Versions 5.1.3 and prior. 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-2019-18235/ (Markdown: https://insights.sbomify.com/CVE-2019-18235/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-18235
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-18235
- OSV: https://osv.dev/vulnerability/CVE-2019-18235

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-18235/
Summaries are generated and may contain mistakes; the official description above is the record.