# CVE-2018-17921: Auth bypass in SAGA1-L8B

> Attackers can force-pair the SAGA1-L8B device without human interaction, bypassing authentication controls.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Oct 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-9xrg-hmr4-g2mq

## What is CVE-2018-17921?

CVE-2018-17921 is a high-severity authentication bypass vulnerability in GAIN Electronic Co. Ltd SAGA1-L8B, published on 24 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

SAGA1-L8B with any firmware versions prior to A0.10 are vulnerable to an attack that may allow an attacker to force-pair the device without human interaction.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2018-17921?

It affects 1 product.


Products: Sagaradio Saga1-L8b Firmware.

## How do I fix CVE-2018-17921?

No fix has been published for CVE-2018-17921 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17921 being exploited?

There is no known exploitation of CVE-2018-17921 in the wild and no public exploit code.

## Other vulnerabilities in GAIN Electronic Co. Ltd SAGA1-L8B

- [CVE-2018-17903](https://insights.sbomify.com/CVE-2018-17903/): Other in SAGA1-L8B (critical 9.1)
- [CVE-2018-17923](https://insights.sbomify.com/CVE-2018-17923/): Auth bypass in SAGA1-L8B (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17921 and fix it if it is affected.

What it is: CVE-2018-17921 is a high-severity authentication bypass vulnerability in GAIN Electronic Co. Ltd SAGA1-L8B, published on 24 Oct 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-2018-17921 in the wild and no public exploit code.

Affected product: GAIN Electronic Co. Ltd SAGA1-L8B. 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-2018-17921/ (Markdown: https://insights.sbomify.com/CVE-2018-17921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17921
- OSV: https://osv.dev/vulnerability/CVE-2018-17921

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-17921/
Summaries are generated and may contain mistakes; the official description above is the record.