# CVE-2017-9487: Information disclosure in n/a

> Remote attackers can discover WAN IPv6 addresses on specific Comcast cable modems by leveraging knowledge of the CM MAC address.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 Jul 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-gx39-f95w-w6mf

## What is CVE-2017-9487?

CVE-2017-9487 is a medium-severity vulnerability in n/a, published on 31 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) and DPC3941T (firmware version DPC3941_2.5s3_PROD_sey) devices allows remote attackers to discover a WAN IPv6 IP address by leveraging knowledge of the CM MAC address.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2017-9487?

It affects 2 products.


Products: Cisco Dpc3939 Firmware, Cisco Dpc3941t Firmware.

## How do I fix CVE-2017-9487?

No fix has been published for CVE-2017-9487 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-9487 being exploited?

There is no known exploitation of CVE-2017-9487 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-9479](https://insights.sbomify.com/CVE-2017-9479/): Command injection in n/a (critical 9.8)
- [CVE-2017-9482](https://insights.sbomify.com/CVE-2017-9482/): Auth bypass in n/a (critical 9.8)
- [CVE-2017-9483](https://insights.sbomify.com/CVE-2017-9483/): Command injection in n/a (critical 9.8)
- [CVE-2017-9521](https://insights.sbomify.com/CVE-2017-9521/): Other in n/a (critical 9.8)
- [CVE-2017-9488](https://insights.sbomify.com/CVE-2017-9488/): Hardcoded credentials in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-9487 and fix it if it is affected.

What it is: CVE-2017-9487 is a medium-severity vulnerability in n/a, published on 31 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-9487 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-2017-9487/ (Markdown: https://insights.sbomify.com/CVE-2017-9487/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9487
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9487
- OSV: https://osv.dev/vulnerability/CVE-2017-9487

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-9487/
Summaries are generated and may contain mistakes; the official description above is the record.