# CVE-2017-6505: Denial of service in n/a

> Local guest OS users can cause a denial of service via an infinite loop in QEMU's OHCI USB controller emulation.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Mar 2017
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-6505, DEBIAN-CVE-2017-6505, GHSA-pfx6-rwwf-8mgx, UBUNTU-CVE-2017-6505

## What is CVE-2017-6505?

CVE-2017-6505 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 15 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The ohci_service_ed_list function in hw/usb/hcd-ohci.c in QEMU (aka Quick Emulator) before 2.9.0 allows local guest OS users to cause a denial of service (infinite loop) via vectors involving the number of link endpoint list descriptors, a different vulnerability than CVE-2017-9330.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2017-6505?

It affects 1 product.


Products: Qemu Qemu.

## How do I fix CVE-2017-6505?

Upgrade to a fixed version.

## Is CVE-2017-6505 being exploited?

There is no known exploitation of CVE-2017-6505 in the wild and no public exploit code.

## Other vulnerabilities in Qemu Qemu

- [CVE-2022-36648](https://insights.sbomify.com/CVE-2022-36648/): Null dereference in n/a (critical 10.0)
- [CVE-2015-8556](https://insights.sbomify.com/CVE-2015-8556/): Race condition in n/a (critical 10.0)
- [CVE-2009-3616](https://insights.sbomify.com/CVE-2009-3616/): Use after free in n/a (critical 9.9)
- [CVE-2019-12928](https://insights.sbomify.com/CVE-2019-12928/): Command injection in n/a (critical 9.8)
- [CVE-2019-12929](https://insights.sbomify.com/CVE-2019-12929/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-6505 and fix it if it is affected.

What it is: CVE-2017-6505 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 15 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-6505 in the wild and no public exploit code.

Affected product: Qemu Qemu. 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-2017-6505/ (Markdown: https://insights.sbomify.com/CVE-2017-6505/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6505
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6505
- OSV: https://osv.dev/vulnerability/CVE-2017-6505

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-6505/
Summaries are generated and may contain mistakes; the official description above is the record.