# CVE-2019-0070: Privilege escalation in Junos OS

> A local attacker can exploit improper input validation in Junos OS NFX to elevate privileges and execute unauthorized commands, potentially taking full control of the system.

- **Severity:** High 8.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Oct 2019
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-33hc-wv7x-jxjc

## What is CVE-2019-0070?

CVE-2019-0070 is a high-severity vulnerability in Juniper Junos, published on 9 Oct 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An Improper Input Validation weakness allows a malicious local attacker to elevate their permissions to take control of other portions of the NFX platform they should not be able to access, and execute commands outside their authorized scope of control. This leads to the attacker being able to take control of the entire system. This issue affects: Juniper Networks Junos OS versions prior to 18.2R1 on NFX Series.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2019-0070?

It affects 1 product.


Products: Juniper Junos.

## How do I fix CVE-2019-0070?

No fix has been published for CVE-2019-0070 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-0070 being exploited?

There is no known exploitation of CVE-2019-0070 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-2019-0070 and fix it if it is affected.

What it is: CVE-2019-0070 is a high-severity vulnerability in Juniper Junos, published on 9 Oct 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-2019-0070 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-2019-0070/ (Markdown: https://insights.sbomify.com/CVE-2019-0070/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-0070
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-0070
- OSV: https://osv.dev/vulnerability/CVE-2019-0070

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-0070/
Summaries are generated and may contain mistakes; the official description above is the record.