# CVE-2018-16596: Memory corruption in n/a

> Remote attackers on the local network can execute code or cause denial of service via a stack-based buffer overflow in the UPnP service.

- **Severity:** High 7.5 (`CVSS:3.0/AV:A/AC:H/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:** 17 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-2fhx-4cr3-fgxc

## What is CVE-2018-16596?

CVE-2018-16596 is a high-severity memory corruption vulnerability in n/a, published on 17 Dec 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A stack-based buffer overflow in the LAN UPnP service running on UDP port 1900 of Swisscom Internet-Box (2, Standard, and Plus) prior to v09.04.00 and Internet-Box light prior to v08.05.02 allows remote code execution. No authentication is required to exploit this vulnerability. Sending a simple UDP packet to port 1900 allows an attacker to execute code on a remote device. However, this is only possible if the attacker is inside the LAN. Because of ASLR, the success rate is not 100% and leads instead to a DoS of the UPnP service. The remaining functionality of the Internet Box is not affected. A reboot of the Internet Box is necessary to attempt the exploit again.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2018-16596?

It affects 4 products.


Products: Swisscom Internet-Box 2 Firmware, Swisscom Internet-Box Light Firmware, Swisscom Internet-Box Plus Firmware, Swisscom Internet-Box Standard Firmware.

## How do I fix CVE-2018-16596?

No fix has been published for CVE-2018-16596 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16596 being exploited?

There is no known exploitation of CVE-2018-16596 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-16134](https://insights.sbomify.com/CVE-2020-16134/): Privilege escalation in n/a (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-16596 and fix it if it is affected.

What it is: CVE-2018-16596 is a high-severity memory corruption vulnerability in n/a, published on 17 Dec 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-2018-16596 in the wild and no public exploit code.

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-2018-16596/ (Markdown: https://insights.sbomify.com/CVE-2018-16596/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16596
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16596
- OSV: https://osv.dev/vulnerability/CVE-2018-16596

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16596/
Summaries are generated and may contain mistakes; the official description above is the record.