# CVE-2007-0247: Denial of service in n/a

> Remote FTP servers can cause a denial of service in Squid proxy via crafted directory listing responses, crashing the service.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Jan 2007
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2007-0247, GHSA-qjvg-797h-7j24

## What is CVE-2007-0247?

CVE-2007-0247 is a medium-severity denial of service vulnerability in n/a, published on 16 Jan 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

squid/src/ftp.c in Squid before 2.6.STABLE7 allows remote FTP servers to cause a denial of service (core dump) via crafted FTP directory listing responses, possibly related to the (1) ftpListingFinish and (2) ftpHtmlifyListEntry functions.

Weakness: CWE-399

## Which versions are affected by CVE-2007-0247?

It affects 1 product.


Products: Squid Squid.

## How do I fix CVE-2007-0247?

Upgrade to a fixed version.

## Is CVE-2007-0247 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-0247 exists.

Public exploit code:

- Squid Proxy 2.5/2.6 - FTP URI Remote Denial of Service (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2005-0194](https://insights.sbomify.com/CVE-2005-0194/): Auth bypass in n/a (critical 10.0)
- [CVE-2005-1345](https://insights.sbomify.com/CVE-2005-1345/): Missing authorization in n/a (high 7.5)
- [CVE-2005-0173](https://insights.sbomify.com/CVE-2005-0173/): Auth bypass in n/a (high 7.5)
- [CVE-2004-0189](https://insights.sbomify.com/CVE-2004-0189/): Security feature bypass in n/a (high 7.5)
- [CVE-2002-0163](https://insights.sbomify.com/CVE-2002-0163/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-0247 and fix it if it is affected.

What it is: CVE-2007-0247 is a medium-severity denial of service vulnerability in n/a, published on 16 Jan 2007. 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-2007-0247 exists.

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-2007-0247/ (Markdown: https://insights.sbomify.com/CVE-2007-0247/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-0247
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-0247
- OSV: https://osv.dev/vulnerability/CVE-2007-0247

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-0247/
Summaries are generated and may contain mistakes; the official description above is the record.