# CVE-2015-5247: Denial of service in n/a

> Authenticated users can crash libvirtd by triggering a failed unlink on root_squash NFS pools, causing denial of service.

- **Severity:** Medium 6.5 (`CVSS:3.0/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:** Yes
- **Published:** 14 Apr 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-5247, GHSA-xq4r-xr6r-76qw

## What is CVE-2015-5247?

CVE-2015-5247 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 14 Apr 2016. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The virStorageVolCreateXML API in libvirt 1.2.14 through 1.2.19 allows remote authenticated users with a read-write connection to cause a denial of service (libvirtd crash) by triggering a failed unlink after creating a volume on a root_squash NFS pool.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2015-5247?

It affects 2 products.


Products: Canonical Ubuntu Linux, Redhat Libvirt.

## How do I fix CVE-2015-5247?

Upgrade to a fixed version.

## Is CVE-2015-5247 being exploited?

There is no known exploitation of CVE-2015-5247 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-5247 and fix it if it is affected.

What it is: CVE-2015-5247 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 14 Apr 2016. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-5247 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2015-5247/ (Markdown: https://insights.sbomify.com/CVE-2015-5247/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-5247
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-5247
- OSV: https://osv.dev/vulnerability/CVE-2015-5247

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-5247/
Summaries are generated and may contain mistakes; the official description above is the record.