# CVE-2023-36672: Information disclosure in n/a

> Clario VPN client leaks local network traffic in plaintext outside the tunnel, allowing attackers to intercept sensitive data.

- **Severity:** Medium 5.7 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 9 Aug 2023
- **Updated:** 17 Oct 2024
- **Also known as:** GHSA-43fw-xm94-j3mx, UBUNTU-CVE-2023-36672

## What is CVE-2023-36672?

CVE-2023-36672 is a medium-severity vulnerability in n/a, published on 9 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. The VPN client insecurely configures the operating system such that traffic to the local network is sent in plaintext outside the VPN tunnel even if the local network is using a non-RFC1918 IP subnet. This allows an adversary to trick the victim into sending arbitrary IP traffic in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in leakage of traffic in plaintext" rather than to only Clario.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information)

## Which versions are affected by CVE-2023-36672?

It affects 1 product.


Products: Clario Vpn.

## How do I fix CVE-2023-36672?

No fix has been published for CVE-2023-36672 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-36672 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36672 exists.

## Other vulnerabilities in n/a

- [CVE-2023-36671](https://insights.sbomify.com/CVE-2023-36671/): Information disclosure in n/a (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36672 and fix it if it is affected.

What it is: CVE-2023-36672 is a medium-severity vulnerability in n/a, published on 9 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36672 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-2023-36672/ (Markdown: https://insights.sbomify.com/CVE-2023-36672/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36672
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36672
- OSV: https://osv.dev/vulnerability/CVE-2023-36672

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36672/
Summaries are generated and may contain mistakes; the official description above is the record.