# CVE-2017-9869: Denial of service in n/a

> Remote attackers can cause a denial of service via a crafted audio file due to a buffer over-read in the mpglib component.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 25 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-9869, GHSA-865p-f477-mwcx, UBUNTU-CVE-2017-9869

## What is CVE-2017-9869?

CVE-2017-9869 is a medium-severity denial of service vulnerability in n/a, published on 25 Jun 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The II_step_one function in layer2.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products, allows remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted audio file.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2017-9869?

It affects 1 product.


Products: Lame Project Lame.

## How do I fix CVE-2017-9869?

Upgrade to a fixed version.

## Is CVE-2017-9869 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-9869 exists.

Public exploit code:

- LAME 3.99.5 - 'II_step_one' Buffer Overflow (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2017-11720](https://insights.sbomify.com/CVE-2017-11720/): Denial of service in n/a (critical 9.8)
- [CVE-2017-15019](https://insights.sbomify.com/CVE-2017-15019/): Null dereference in n/a (high 7.8)
- [CVE-2017-9871](https://insights.sbomify.com/CVE-2017-9871/): Memory corruption in n/a (high 7.8)
- [CVE-2017-9872](https://insights.sbomify.com/CVE-2017-9872/): Memory corruption in n/a (high 7.8)
- [CVE-2017-8419](https://insights.sbomify.com/CVE-2017-8419/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-9869 and fix it if it is affected.

What it is: CVE-2017-9869 is a medium-severity denial of service vulnerability in n/a, published on 25 Jun 2017. It can only be exploited from the same machine or local network, 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-2017-9869 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-2017-9869/ (Markdown: https://insights.sbomify.com/CVE-2017-9869/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9869
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9869
- OSV: https://osv.dev/vulnerability/CVE-2017-9869

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-9869/
Summaries are generated and may contain mistakes; the official description above is the record.