# CVE-2015-7849: Use after free in n/a

> Remote authenticated attackers can trigger a use-after-free in NTPd to execute arbitrary code or crash the service.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 7 Aug 2017
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-7849, GHSA-47fj-2qv7-3xvh

## What is CVE-2015-7849?

CVE-2015-7849 is a high-severity use after free vulnerability in Netapp Clustered Data Ontap, published on 7 Aug 2017. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Use-after-free vulnerability in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to possibly execute arbitrary code or cause a denial of service (crash) via crafted packets.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2015-7849?

It affects 6 products.


Products: Netapp Clustered Data Ontap, Netapp Data Ontap, Netapp Oncommand Balance, Netapp Oncommand Performance Manager, Netapp Oncommand Unified Manager, Ntp Ntp.

## How do I fix CVE-2015-7849?

Upgrade to a fixed version.

## Is CVE-2015-7849 being exploited?

There is no known exploitation of CVE-2015-7849 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Clustered Data Ontap

- [CVE-2015-7853](https://insights.sbomify.com/CVE-2015-7853/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-9119](https://insights.sbomify.com/CVE-2017-9119/): Denial of service in n/a (critical 9.8)
- [CVE-2016-7480](https://insights.sbomify.com/CVE-2016-7480/): Deserialization in PHP before 7.0.12 (critical 9.8)
- [CVE-2017-5340](https://insights.sbomify.com/CVE-2017-5340/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-11147](https://insights.sbomify.com/CVE-2017-11147/): Information disclosure in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-7849 and fix it if it is affected.

What it is: CVE-2015-7849 is a high-severity use after free vulnerability in Netapp Clustered Data Ontap, published on 7 Aug 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-7849 in the wild and no public exploit code.

Affected product: Netapp Clustered Data Ontap. 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-2015-7849/ (Markdown: https://insights.sbomify.com/CVE-2015-7849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-7849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-7849
- OSV: https://osv.dev/vulnerability/CVE-2015-7849

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-7849/
Summaries are generated and may contain mistakes; the official description above is the record.