# CVE-2017-12306: Security feature bypass in Cisco Spark Board

> An authenticated local attacker can bypass signature verification to install custom firmware on Cisco Spark Boards, enabling arbitrary code execution.

- **Severity:** Medium 4.4 (`CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Nov 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-83qx-28gx-pcx4

## What is CVE-2017-12306?

CVE-2017-12306 is a medium-severity vulnerability in Cisco Spark Board, published on 16 Nov 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the upgrade process of Cisco Spark Board could allow an authenticated, local attacker to install an unverified upgrade package, aka Signature Verification Bypass. The vulnerability is due to insufficient upgrade package validation. An attacker could exploit this vulnerability by providing the upgrade process with an upgrade package that the attacker controls. An exploit could allow the attacker to install custom firmware to the Spark Board. Cisco Bug IDs: CSCvf84502.

Weakness: CWE-494 (Download of Code Without Integrity Check), CWE-16

## Which versions are affected by CVE-2017-12306?

It affects 1 product.


Products: Cisco Conference Director.

## How do I fix CVE-2017-12306?

No fix has been published for CVE-2017-12306 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-12306 being exploited?

There is no known exploitation of CVE-2017-12306 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Spark Board

- [CVE-2018-0119](https://insights.sbomify.com/CVE-2018-0119/): Missing authorization in Cisco Spark (medium 4.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-12306 and fix it if it is affected.

What it is: CVE-2017-12306 is a medium-severity vulnerability in Cisco Spark Board, published on 16 Nov 2017. 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-2017-12306 in the wild and no public exploit code.

Affected product: Cisco Spark Board. 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-2017-12306/ (Markdown: https://insights.sbomify.com/CVE-2017-12306/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-12306
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-12306
- OSV: https://osv.dev/vulnerability/CVE-2017-12306

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-12306/
Summaries are generated and may contain mistakes; the official description above is the record.