# CVE-2017-7915: Auth bypass in Moxa OnCell

> Attackers can bypass authentication on Moxa OnCell devices via brute force due to missing rate limiting on login attempts.

- **Severity:** Critical 9.8 (`CVSS:3.0/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:** 29 May 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-v7gp-p3wf-4g2v

## What is CVE-2017-7915?

CVE-2017-7915 is a critical authentication bypass vulnerability in Moxa OnCell, published on 29 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An Improper Restriction of Excessive Authentication Attempts issue was discovered in Moxa OnCell G3110-HSPA Version 1.3 build 15082117 and previous versions, OnCell G3110-HSDPA Version 1.2 Build 09123015 and previous versions, OnCell G3150-HSDPA Version 1.4 Build 11051315 and previous versions, OnCell 5104-HSDPA, OnCell 5104-HSPA, and OnCell 5004-HSPA. An attacker can freely use brute force to determine parameters needed to bypass authentication.

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

## Which versions are affected by CVE-2017-7915?

It affects 6 products.


Products: Moxa Oncell 5004-Hspa Firmware, Moxa Oncell 5104-Hsdpa Firmware, Moxa Oncell 5104-Hspa Firmware, Moxa Oncell G3110-Hsdpa Firmware, Moxa Oncell G3110-Hspa Firmware, Moxa Oncell G3150-Hsdpa Firmware.

## How do I fix CVE-2017-7915?

No fix has been published for CVE-2017-7915 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-7915 being exploited?

There is no known exploitation of CVE-2017-7915 in the wild and no public exploit code.

## Other vulnerabilities in Moxa OnCell

- [CVE-2017-7913](https://insights.sbomify.com/CVE-2017-7913/): Information disclosure in Moxa OnCell (critical 9.8)
- [CVE-2017-7917](https://insights.sbomify.com/CVE-2017-7917/): Cross-site request forgery in Moxa OnCell (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-7915 and fix it if it is affected.

What it is: CVE-2017-7915 is a critical authentication bypass vulnerability in Moxa OnCell, published on 29 May 2017. 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-2017-7915 in the wild and no public exploit code.

Affected product: Moxa OnCell. 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-2017-7915/ (Markdown: https://insights.sbomify.com/CVE-2017-7915/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-7915
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-7915
- OSV: https://osv.dev/vulnerability/CVE-2017-7915

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-7915/
Summaries are generated and may contain mistakes; the official description above is the record.