# CVE-2019-3916: Information disclosure in Fios Quantum Gateway (G1100)

> Remote unauthenticated attackers can retrieve the password salt from Verizon Fios Quantum Gateway firmware via an exposed API endpoint.

- **Severity:** High 7.5 (`CVSS:3.0/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:** 11 Apr 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-p5fq-87jh-gjq8

## What is CVE-2019-3916?

CVE-2019-3916 is a high-severity vulnerability in Verizon Fios Quantum Gateway (G1100), published on 11 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Information disclosure vulnerability in Verizon Fios Quantum Gateway (G1100) firmware version 02.01.00.05 allows an remote, unauthenticated attacker to retrieve the value of the password salt by simply requesting an API URL in a web browser (e.g. /api).

Weakness: CWE-425 (Direct Request)

## Which versions are affected by CVE-2019-3916?

It affects 1 product.


Products: Verizon Fios Quantum Gateway G1100 Firmware.

## How do I fix CVE-2019-3916?

No fix has been published for CVE-2019-3916 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-3916 being exploited?

There is no known exploitation of CVE-2019-3916 in the wild and no public exploit code.

## Other vulnerabilities in Verizon Fios Quantum Gateway (G1100)

- [CVE-2019-3915](https://insights.sbomify.com/CVE-2019-3915/): Auth bypass in Fios Quantum Gateway (G1100) (high 7.5)
- [CVE-2019-3914](https://insights.sbomify.com/CVE-2019-3914/): Command injection in Fios Quantum Gateway (G1100) (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3916 and fix it if it is affected.

What it is: CVE-2019-3916 is a high-severity vulnerability in Verizon Fios Quantum Gateway (G1100), published on 11 Apr 2019. 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-2019-3916 in the wild and no public exploit code.

Affected product: Verizon Fios Quantum Gateway (G1100). 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-2019-3916/ (Markdown: https://insights.sbomify.com/CVE-2019-3916/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3916
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3916
- OSV: https://osv.dev/vulnerability/CVE-2019-3916

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-3916/
Summaries are generated and may contain mistakes; the official description above is the record.