# CVE-2013-4730: Memory corruption in n/a

> Remote attackers can execute arbitrary code on PCMan's FTP Server via a buffer overflow in the USER command.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 May 2014
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-gx95-jx2h-w327

## What is CVE-2013-4730?

CVE-2013-4730 is a critical memory corruption vulnerability in Pcman Ftp Server, published on 15 May 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer overflow in PCMan's FTP Server 2.0.7 allows remote attackers to execute arbitrary code via a long string in a USER command.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2013-4730?

It affects 1 product.


Products: Pcman Ftp Server.

## How do I fix CVE-2013-4730?

No fix has been published for CVE-2013-4730 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-4730 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-4730 exists.

Public exploit code:

- A very simple buffer overflow using CVE-2013-4730 against PCman's FTP server (github_poc): https://github.com/t0rt3ll1n0/PCmanBoF
- PCMAN FTP Server Post-Authentication STOR Command Stack Buffer Overflow (metasploit)
- PCMan FTP Server 2.0 - Remote Buffer Overflow (exploitdb)
- PCMan FTP Server 2.0.7 - Remote (Metasploit) (exploitdb)
- PCMan FTP Server 2.07 - 'PASS' Remote Buffer Overflow (exploitdb)
- PCMan FTP Server 2.07 - 'STOR' Remote Buffer Overflow (exploitdb)

## Other vulnerabilities in Pcman Ftp Server

- [CVE-2018-18861](https://insights.sbomify.com/CVE-2018-18861/): Memory corruption in n/a (critical 9.8)
- [CVE-2015-7601](https://insights.sbomify.com/CVE-2015-7601/): Path traversal in n/a (high 7.8)
- [CVE-2025-5634](https://insights.sbomify.com/CVE-2025-5634/): PCMan FTP Server NOOP Command buffer overflow (medium 6.9)
- [CVE-2025-5635](https://insights.sbomify.com/CVE-2025-5635/): PCMan FTP Server PLS Command buffer overflow (medium 6.9)
- [CVE-2025-5636](https://insights.sbomify.com/CVE-2025-5636/): PCMan FTP Server SET Command buffer overflow (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-4730 and fix it if it is affected.

What it is: CVE-2013-4730 is a critical memory corruption vulnerability in Pcman Ftp Server, published on 15 May 2014. 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-2013-4730 exists.

Affected product: Pcman 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-2013-4730/ (Markdown: https://insights.sbomify.com/CVE-2013-4730/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-4730
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-4730
- OSV: https://osv.dev/vulnerability/CVE-2013-4730

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-4730/
Summaries are generated and may contain mistakes; the official description above is the record.