# CVE-2019-13263: Information disclosure in n/a

> Attackers can leak data from the host network to the guest network via DHCP transaction IDs due to insufficient compartmentalization in D-Link routers.

- **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:** 27 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-jrgh-f66h-m27j

## What is CVE-2019-13263?

CVE-2019-13263 is a high-severity vulnerability in n/a, published on 27 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

D-link DIR-825AC G1 devices have Insufficient Compartmentalization between a host network and a guest network that are established by the same device. A DHCP Request is sent to the router with a certain Transaction ID field. Following the DHCP protocol, the router responds with an ACK or NAK message. Studying the NAK case revealed that the router erroneously sends the NAK to both Host and Guest networks with the same Transaction ID as found in the DHCP Request. This allows encoding of data to be sent cross-router into the 32-bit Transaction ID field.

Weakness: CWE-669 (Incorrect Resource Transfer Between Spheres)

## Which versions are affected by CVE-2019-13263?

It affects 1 product.


Products: Dlink Dir-825\/Ac G1 Firmware.

## How do I fix CVE-2019-13263?

No fix has been published for CVE-2019-13263 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-13263 being exploited?

There is no known exploitation of CVE-2019-13263 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-13264](https://insights.sbomify.com/CVE-2019-13264/): Information disclosure in n/a (high 8.8)
- [CVE-2019-13265](https://insights.sbomify.com/CVE-2019-13265/): Information disclosure in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-13263 and fix it if it is affected.

What it is: CVE-2019-13263 is a high-severity vulnerability in n/a, published on 27 Aug 2019. 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-2019-13263 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-2019-13263/ (Markdown: https://insights.sbomify.com/CVE-2019-13263/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-13263
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-13263
- OSV: https://osv.dev/vulnerability/CVE-2019-13263

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-13263/
Summaries are generated and may contain mistakes; the official description above is the record.