# CVE-2015-3006: Junos: QFX Series: Insufficient entropy on QFX3500 and QFX3600 platforms when the system boots up

> Insufficient entropy at boot on Juniper QFX switches may generate weak SSH keys or SSL certificates, allowing attackers to compromise secure communications.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Feb 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-639q-4j2p-pfqv

## What is CVE-2015-3006?

CVE-2015-3006 is a medium-severity vulnerability in Juniper Junos, published on 28 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

On the QFX3500 and QFX3600 platforms, the number of bytes collected from the RANDOM_INTERRUPT entropy source when the device boots up is insufficient, possibly leading to weak or duplicate SSH keys or self-signed SSL/TLS certificates. Entropy increases after the system has been up and running for some time, but immediately after boot, the entropy is very low. This issue only affects the QFX3500 and QFX3600 switches. No other Juniper Networks products or platforms are affected by this weak entropy vulnerability.

Weakness: CWE-331 (Insufficient Entropy)

## Which versions are affected by CVE-2015-3006?

It affects 1 product.


Products: Juniper Junos.

## How do I fix CVE-2015-3006?

No fix has been published for CVE-2015-3006 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-3006 being exploited?

There is no known exploitation of CVE-2015-3006 in the wild and no public exploit code.

## Other vulnerabilities in Juniper Junos

- [CVE-2023-36845](https://insights.sbomify.com/CVE-2023-36845/): Juniper Junos OS EX Series and SRX Series PHP External Variable Modification (critical 9.8, exploited in the wild)
- [CVE-2020-1631](https://insights.sbomify.com/CVE-2020-1631/): Juniper Junos OS Path Traversal (high 8.8, exploited in the wild)
- [CVE-2025-21590](https://insights.sbomify.com/CVE-2025-21590/): Juniper Junos OS Improper Isolation or Compartmentalization (medium 6.7, exploited in the wild)
- [CVE-2023-36851](https://insights.sbomify.com/CVE-2023-36851/): Juniper Junos OS SRX Series Missing Authentication for Critical Function (medium 5.3, exploited in the wild)
- [CVE-2023-36844](https://insights.sbomify.com/CVE-2023-36844/): Juniper Junos OS EX Series PHP External Variable Modification (medium 5.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-3006 and fix it if it is affected.

What it is: CVE-2015-3006 is a medium-severity vulnerability in Juniper Junos, published on 28 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-3006 in the wild and no public exploit code.

Affected product: Juniper Junos. 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-2015-3006/ (Markdown: https://insights.sbomify.com/CVE-2015-3006/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-3006
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-3006
- OSV: https://osv.dev/vulnerability/CVE-2015-3006

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-3006/
Summaries are generated and may contain mistakes; the official description above is the record.