# CVE-2023-42771: Auth bypass in ACERA 1310

> An unauthenticated network-adjacent attacker can bypass authentication to download or upload configuration and firmware files in standalone mode.

- **Severity:** High 8.3 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L`)
- **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:** 3 Oct 2023
- **Updated:** 20 Sep 2024
- **Also known as:** GHSA-j2mj-6c7w-rh5m

## What is CVE-2023-42771?

CVE-2023-42771 is a high-severity authentication bypass vulnerability in FURUNO SYSTEMS Co.,Ltd. ACERA 1310, published on 3 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Authentication bypass vulnerability in ACERA 1320 firmware ver.01.26 and earlier, and ACERA 1310 firmware ver.01.26 and earlier allows a network-adjacent unauthenticated attacker who can access the affected product to download configuration files and/or log files, and upload configuration files and/or firmware. They are affected when running in ST(Standalone) mode.

Weakness: CWE-287 (Improper Authentication), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2023-42771?

It affects 2 products.


Products: Furunosystems Acera 1310 Firmware, Furunosystems Acera 1320 Firmware.

## How do I fix CVE-2023-42771?

No fix has been published for CVE-2023-42771 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-42771 being exploited?

There is no known exploitation of CVE-2023-42771 in the wild and no public exploit code.

## Other vulnerabilities in FURUNO SYSTEMS Co.,Ltd. ACERA 1310

- [CVE-2023-43627](https://insights.sbomify.com/CVE-2023-43627/): Path traversal in ACERA 1310 (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-42771 and fix it if it is affected.

What it is: CVE-2023-42771 is a high-severity authentication bypass vulnerability in FURUNO SYSTEMS Co.,Ltd. ACERA 1310, published on 3 Oct 2023. 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-2023-42771 in the wild and no public exploit code.

Affected product: FURUNO SYSTEMS Co.,Ltd. ACERA 1310. 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-2023-42771/ (Markdown: https://insights.sbomify.com/CVE-2023-42771/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-42771
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-42771
- OSV: https://osv.dev/vulnerability/CVE-2023-42771

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-42771/
Summaries are generated and may contain mistakes; the official description above is the record.