# CVE-2020-2011: PAN-OS: Panorama registration denial of service

> Remote unauthenticated attackers can crash the configuration service and force Panorama into maintenance mode via crafted registration requests.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 May 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-hvgf-279c-6rmq

## What is CVE-2020-2011?

CVE-2020-2011 is a high-severity denial of service vulnerability in Paloaltonetworks Pan-Os, published on 13 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An improper input validation vulnerability in the configuration daemon of Palo Alto Networks PAN-OS Panorama allows for a remote unauthenticated user to send a specifically crafted registration request to the device that causes the configuration service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS Panorama services by restarting the device and putting it into maintenance mode. This issue affects: All versions of PAN-OS 7.1, PAN-OS 8.0; PAN-OS 8.1 versions earlier than 8.1.14; PAN-OS 9.0 versions earlier than 9.0.7; PAN-OS 9.1 versions earlier than 9.1.0.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-2011?

It affects 1 product.


Products: Paloaltonetworks Pan-Os.

## How do I fix CVE-2020-2011?

No fix has been published for CVE-2020-2011 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-2011 being exploited?

There is no known exploitation of CVE-2020-2011 in the wild and no public exploit code.

## Other vulnerabilities in Paloaltonetworks Pan-Os

- [CVE-2024-3400](https://insights.sbomify.com/CVE-2024-3400/): Palo Alto Networks PAN-OS Command Injection (critical 10.0, exploited in the wild)
- [CVE-2020-2021](https://insights.sbomify.com/CVE-2020-2021/): Palo Alto Networks PAN-OS Authentication Bypass (critical 10.0, exploited in the wild)
- [CVE-2017-15944](https://insights.sbomify.com/CVE-2017-15944/): Palo Alto Networks PAN-OS Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2026-0300](https://insights.sbomify.com/CVE-2026-0300/): Palo Alto Networks PAN-OS Out-of-bounds Write (critical 9.3, exploited in the wild)
- [CVE-2024-0012](https://insights.sbomify.com/CVE-2024-0012/): Palo Alto Networks PAN-OS Management Interface Authentication Bypass (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-2011 and fix it if it is affected.

What it is: CVE-2020-2011 is a high-severity denial of service vulnerability in Paloaltonetworks Pan-Os, published on 13 May 2020. 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-2020-2011 in the wild and no public exploit code.

Affected product: Paloaltonetworks Pan-Os. 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-2020-2011/ (Markdown: https://insights.sbomify.com/CVE-2020-2011/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-2011
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-2011
- OSV: https://osv.dev/vulnerability/CVE-2020-2011

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-2011/
Summaries are generated and may contain mistakes; the official description above is the record.