# CVE-2017-17555: Null dereference in n/a

> Remote attackers can cause a denial of service via a crafted audio file due to a NULL pointer dereference in the FFmpeg libswresample library.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **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:** Yes
- **Published:** 12 Dec 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-17555, GHSA-87h5-vmx9-f2ff, PYSEC-2017-77, UBUNTU-CVE-2017-17555

## What is CVE-2017-17555?

CVE-2017-17555 is a medium-severity vulnerability in Ffmpeg Ffmpeg, published on 12 Dec 2017. 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

The swri_audio_convert function in audioconvert.c in FFmpeg libswresample through 3.0.101, as used in FFmpeg 3.4.1, aubio 0.4.6, and other products, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted audio file.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2017-17555?

1 open source package ship an affected version, including aubio. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `aubio` | PyPI | All versions | 0.4.7 |

Products: Aubio Aubio, Ffmpeg Ffmpeg, Ffmpeg Libswresample.

## How do I fix CVE-2017-17555?

Upgrade aubio to 0.4.7 or later.

## Is CVE-2017-17555 being exploited?

There is no known exploitation of CVE-2017-17555 in the wild and no public exploit code.

## Other vulnerabilities in Ffmpeg Ffmpeg

- [CVE-2018-19800](https://insights.sbomify.com/CVE-2018-19800/): aubio Buffer Overflow vulnerability (critical 9.8)
- [CVE-2018-14521](https://insights.sbomify.com/CVE-2018-14521/): Aubio is vulnerable to denial of service via aubio_source_avcodec_readframe function (high 8.8)
- [CVE-2018-14522](https://insights.sbomify.com/CVE-2018-14522/): Aubio is vulnerable to denial of service via aubio_pitch_set_unit function (high 8.8)
- [CVE-2018-14523](https://insights.sbomify.com/CVE-2018-14523/): Aubio is vulnerable to out of bound read when samplerate > 50kHz (high 8.8)
- [CVE-2018-19801](https://insights.sbomify.com/CVE-2018-19801/): Aubio is vulnerable to a NULL pointer dereference in new_aubio_filterbank (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-17555 and fix it if it is affected.

What it is: CVE-2017-17555 is a medium-severity vulnerability in Ffmpeg Ffmpeg, published on 12 Dec 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2017-17555 in the wild and no public exploit code.

Affected packages and fixed versions:
- aubio (PyPI): affected all versions; fixed in 0.4.7

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-2017-17555/ (Markdown: https://insights.sbomify.com/CVE-2017-17555/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-17555
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-17555
- OSV: https://osv.dev/vulnerability/CVE-2017-17555

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-17555/
Summaries are generated and may contain mistakes; the official description above is the record.