# CVE-2011-4579: Memory corruption in n/a

> Remote attackers can cause denial of service via memory corruption in FFmpeg's SVQ1 decoder by sending a crafted stream.

- **Severity:** Medium 4.3 (`AV:N/AC:M/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:** 20 Aug 2012
- **Updated:** 17 Sep 2024
- **Also known as:** DEBIAN-CVE-2011-4579, GHSA-pj2p-3xg2-cf68

## What is CVE-2011-4579?

CVE-2011-4579 is a medium-severity memory corruption vulnerability in Ffmpeg Ffmpeg, published on 20 Aug 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The svq1_decode_frame function in the SVQ1 decoder (svq1dec.c) in libavcodec in FFmpeg 0.5.x before 0.5.7, 0.6.x before 0.6.4, 0.7.x before 0.7.9, and 0.8.x before 0.8.8; and in Libav 0.5.x before 0.5.6, 0.6.x before 0.6.4, and 0.7.x before 0.7.3 allows remote attackers to cause a denial of service (memory corruption) via a crafted SVQ1 stream, related to "dimensions changed."

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

## Which versions are affected by CVE-2011-4579?

It affects 2 products.


Products: Ffmpeg Ffmpeg, Libav Libav.

## How do I fix CVE-2011-4579?

Upgrade to a fixed version.

## Is CVE-2011-4579 being exploited?

There is no known exploitation of CVE-2011-4579 in the wild and no public exploit code.

## Other vulnerabilities in Ffmpeg Ffmpeg

- [CVE-2013-0864](https://insights.sbomify.com/CVE-2013-0864/): Memory corruption in n/a (critical 10.0)
- [CVE-2013-0872](https://insights.sbomify.com/CVE-2013-0872/): Memory corruption in n/a (critical 10.0)
- [CVE-2013-0873](https://insights.sbomify.com/CVE-2013-0873/): Memory corruption in n/a (critical 10.0)
- [CVE-2013-4265](https://insights.sbomify.com/CVE-2013-4265/): Null dereference in n/a (critical 10.0)
- [CVE-2011-3937](https://insights.sbomify.com/CVE-2011-3937/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-4579 and fix it if it is affected.

What it is: CVE-2011-4579 is a medium-severity memory corruption vulnerability in Ffmpeg Ffmpeg, published on 20 Aug 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2011-4579 in the wild and no public exploit code.

Affected product: Ffmpeg Ffmpeg. 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-2011-4579/ (Markdown: https://insights.sbomify.com/CVE-2011-4579/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-4579
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-4579
- OSV: https://osv.dev/vulnerability/CVE-2011-4579

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-4579/
Summaries are generated and may contain mistakes; the official description above is the record.