# CVE-2019-25588: BulletProof FTP Server 2019.0.0.50 Denial of Service via DNS Address

> Local attackers can crash BulletProof FTP Server by supplying an excessively long string to the DNS Address field in Firewall settings.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Mar 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-h3gg-hh2w-3wmp

## What is CVE-2019-25588?

CVE-2019-25588 is a medium-severity denial of service vulnerability in Bpftpserver BulletProof FTP Server, published on 22 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

BulletProof FTP Server 2019.0.0.50 contains a denial of service vulnerability in the DNS Address field that allows local attackers to crash the application by supplying an excessively long string. Attackers can enable the DNS Address option in the Firewall settings and paste a buffer of 700 bytes to trigger a crash when the Test function is invoked.

Weakness: CWE-1282 (Assumed-Immutable Data is Stored in Writable Memory)

## Which versions are affected by CVE-2019-25588?

It affects 1 product.


Products: Bpftpserver Bulletproof Ftp Server.

## How do I fix CVE-2019-25588?

No fix has been published for CVE-2019-25588 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-25588 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25588 exists.

## Other vulnerabilities in Bpftpserver BulletProof FTP Server

- [CVE-2019-25587](https://insights.sbomify.com/CVE-2019-25587/): BulletProof FTP Server 2019.0.0.50 Storage-Path Denial of Service (medium 6.9)
- [CVE-2018-25229](https://insights.sbomify.com/CVE-2018-25229/): BulletProof FTP Server 2019.0.0.50 Denial of Service via SMTP (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25588 and fix it if it is affected.

What it is: CVE-2019-25588 is a medium-severity denial of service vulnerability in Bpftpserver BulletProof FTP Server, published on 22 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25588 exists.

Affected product: Bpftpserver BulletProof FTP Server. 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-2019-25588/ (Markdown: https://insights.sbomify.com/CVE-2019-25588/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25588
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25588
- OSV: https://osv.dev/vulnerability/CVE-2019-25588

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-25588/
Summaries are generated and may contain mistakes; the official description above is the record.