# CVE-2007-4939: Memory corruption in n/a

> Remote attackers can execute arbitrary code or crash Media Player Classic by tricking users into opening a malicious AVI file.

- **Severity:** Critical 9.3 (`AV:N/AC:M/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Sep 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-h42m-cfwq-x7m7

## What is CVE-2007-4939?

CVE-2007-4939 is a critical memory corruption vulnerability in n/a, published on 18 Sep 2007. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Heap-based buffer overflow in mplayerc.exe in Media Player Classic (MPC) 6.4.9.0 and earlier, as used standalone and in mympc (aka CD-Storm) 1.0.0.1, StormPlayer 1.0.4, and possibly other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a .avi file with an "indx truck size" of 0xffffffff, and certain wLongsPerEntry and nEntriesInuse values.

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

## Which versions are affected by CVE-2007-4939?

It affects 3 products.


Products: Guliverkli Media Player Classic, Mympc Cd-Storm, Verycd Stormplayer.

## How do I fix CVE-2007-4939?

No fix has been published for CVE-2007-4939 yet. Limit exposure of the affected software until one is available.

## Is CVE-2007-4939 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-4939 exists.

Public exploit code:

- Media Player Classic 6.4.9 - Malformed AVI Header Multiple Remote Vulnerabilities (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2007-4940](https://insights.sbomify.com/CVE-2007-4940/): Integer overflow in n/a (critical 9.3)
- [CVE-2006-7222](https://insights.sbomify.com/CVE-2006-7222/): Memory corruption in n/a (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-4939 and fix it if it is affected.

What it is: CVE-2007-4939 is a critical memory corruption vulnerability in n/a, published on 18 Sep 2007. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-4939 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-2007-4939/ (Markdown: https://insights.sbomify.com/CVE-2007-4939/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-4939
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-4939
- OSV: https://osv.dev/vulnerability/CVE-2007-4939

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-4939/
Summaries are generated and may contain mistakes; the official description above is the record.