# CVE-2020-29069: Null dereference in n/a

> Attackers can cause denial of service in Modern Honey Network by submitting IP addresses missing from the local geolocation database.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:** 24 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-c788-7228-4w94

## What is CVE-2020-29069?

CVE-2020-29069 is a medium-severity vulnerability in n/a, published on 24 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

_get_flag_ip_localdb in server/mhn/ui/utils.py in Modern Honey Network (MHN) through 2020-11-23 allows attackers to cause a denial-of-service via an IP address that is absent from a local geolocation database, because the code tries to uppercase a return value even if that value is not a string.

## Which versions are affected by CVE-2020-29069?

It affects 1 product.


Products: Modern Honey Network Project Modern Honey Network.

## How do I fix CVE-2020-29069?

No fix has been published for CVE-2020-29069 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-29069 being exploited?

There is no known exploitation of CVE-2020-29069 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-37234](https://insights.sbomify.com/CVE-2021-37234/): Missing authorization in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-29069 and fix it if it is affected.

What it is: CVE-2020-29069 is a medium-severity vulnerability in n/a, published on 24 Nov 2020. 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-2020-29069 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-2020-29069/ (Markdown: https://insights.sbomify.com/CVE-2020-29069/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-29069
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-29069
- OSV: https://osv.dev/vulnerability/CVE-2020-29069

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-29069/
Summaries are generated and may contain mistakes; the official description above is the record.