# CVE-2023-27152: Auth bypass in n/a

> Attackers can brute-force authentication due to missing rate limits, potentially gaining unauthorized access to the OPNsense firewall.

- **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:** 23 Oct 2023
- **Updated:** 11 Sep 2024
- **Also known as:** GHSA-c359-g3mh-v8vw

## What is CVE-2023-27152?

CVE-2023-27152 is a critical authentication bypass vulnerability in n/a, published on 23 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

DECISO OPNsense 23.1 does not impose rate limits for authentication, allowing attackers to perform a brute-force attack to bypass authentication.

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

## Which versions are affected by CVE-2023-27152?

It affects 1 product.


Products: Opnsense Opnsense.

## How do I fix CVE-2023-27152?

No fix has been published for CVE-2023-27152 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-27152 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27152 exists.

## Other vulnerabilities in n/a

- [CVE-2023-39001](https://insights.sbomify.com/CVE-2023-39001/): Command injection in n/a (critical 9.8)
- [CVE-2023-39004](https://insights.sbomify.com/CVE-2023-39004/): Information disclosure in n/a (critical 9.8)
- [CVE-2023-39008](https://insights.sbomify.com/CVE-2023-39008/): Command injection in n/a (critical 9.8)
- [CVE-2023-39007](https://insights.sbomify.com/CVE-2023-39007/): Cross-site scripting in n/a (critical 9.6)
- [CVE-2026-44193](https://insights.sbomify.com/CVE-2026-44193/): OPNsense: RCE via XMLRPC endpoint using `opnsense.restore_config_section` method (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-27152 and fix it if it is affected.

What it is: CVE-2023-27152 is a critical authentication bypass vulnerability in n/a, published on 23 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27152 exists.

Affected product: n/a. 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-2023-27152/ (Markdown: https://insights.sbomify.com/CVE-2023-27152/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-27152
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-27152
- OSV: https://osv.dev/vulnerability/CVE-2023-27152

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-27152/
Summaries are generated and may contain mistakes; the official description above is the record.