# CVE-2021-3559: Denial of service in libvirt

> An unprivileged client can crash the libvirt daemon via a specific command on hosts with mediated PCI devices, impacting system availability.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4236-36gg-25m7

## What is CVE-2021-3559?

CVE-2021-3559 is a medium-severity denial of service vulnerability in Netapp Ontap Select Deploy Administration Utility, published on 24 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in libvirt in the virConnectListAllNodeDevices API in versions before 7.0.0. It only affects hosts with a PCI device and driver that supports mediated devices (e.g., GRID driver). This flaw could be used by an unprivileged client with a read-only connection to crash the libvirt daemon by executing the 'nodedev-list' virsh command. The highest threat from this vulnerability is to system availability.

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

## Which versions are affected by CVE-2021-3559?

It affects 2 products.


Products: Netapp Ontap Select Deploy Administration Utility, Redhat Libvirt.

## How do I fix CVE-2021-3559?

No fix has been published for CVE-2021-3559 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-3559 being exploited?

There is no known exploitation of CVE-2021-3559 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Ontap Select Deploy Administration Utility

- [CVE-2020-35527](https://insights.sbomify.com/CVE-2020-35527/): Memory corruption in sqlite (critical 9.8)
- [CVE-2020-11656](https://insights.sbomify.com/CVE-2020-11656/): Use after free in n/a (critical 9.8)
- [CVE-2019-5509](https://insights.sbomify.com/CVE-2019-5509/): Code injection in ONTAP Select Deploy administration utility (critical 9.8)
- [CVE-2019-5504](https://insights.sbomify.com/CVE-2019-5504/): Missing authorization in ONTAP Select Deploy administration utility (critical 9.8)
- [CVE-2019-5505](https://insights.sbomify.com/CVE-2019-5505/): Information disclosure in ONTAP Select Deploy administration utility (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3559 and fix it if it is affected.

What it is: CVE-2021-3559 is a medium-severity denial of service vulnerability in Netapp Ontap Select Deploy Administration Utility, published on 24 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-3559 in the wild and no public exploit code.

Affected product: Netapp Ontap Select Deploy Administration Utility. 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-2021-3559/ (Markdown: https://insights.sbomify.com/CVE-2021-3559/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3559
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3559
- OSV: https://osv.dev/vulnerability/CVE-2021-3559

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-3559/
Summaries are generated and may contain mistakes; the official description above is the record.