# CVE-2024-1016: Solar FTP Server PASV Command denial of service

> Remote attackers can cause a denial of service in Solar FTP Server via the PASV command handler, requiring a patch for mitigation.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jan 2024
- **Updated:** 17 Jun 2025
- **Also known as:** GHSA-4wm4-8487-w6cr

## What is CVE-2024-1016?

CVE-2024-1016 is a medium-severity denial of service vulnerability in Solar FTP Server, published on 29 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was found in Solar FTP Server 2.1.1/2.1.2. It has been declared as problematic. This vulnerability affects unknown code of the component PASV Command Handler. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. VDB-252286 is the identifier assigned to this vulnerability.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2024-1016?

It affects 1 product.


Products: Flexbyte Solar Ftp Server.

## How do I fix CVE-2024-1016?

No fix has been published for CVE-2024-1016 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-1016 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1016 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1016 and fix it if it is affected.

What it is: CVE-2024-1016 is a medium-severity denial of service vulnerability in Solar FTP Server, published on 29 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1016 exists.

Affected product: Solar 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-2024-1016/ (Markdown: https://insights.sbomify.com/CVE-2024-1016/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1016
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1016
- OSV: https://osv.dev/vulnerability/CVE-2024-1016

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-1016/
Summaries are generated and may contain mistakes; the official description above is the record.