# CVE-2015-7853: Integer overflow in n/a

> Remote attackers can execute arbitrary code or cause a crash in NTP servers by sending a negative input value to the refclock driver.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **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-2015-7853, GHSA-m46c-h6cr-xhm7, UBUNTU-CVE-2015-7853

## What is CVE-2015-7853?

CVE-2015-7853 is a critical vulnerability in Netapp Clustered Data Ontap, published on 7 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2015-7853?

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-2015-7853?

Upgrade to a fixed version.

## Is CVE-2015-7853 being exploited?

There is no known exploitation of CVE-2015-7853 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Clustered Data Ontap

- [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)
- [CVE-2018-5490](https://insights.sbomify.com/CVE-2018-5490/): Missing authorization in Clustered Data ONTAP (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-7853 and fix it if it is affected.

What it is: CVE-2015-7853 is a critical vulnerability in Netapp Clustered Data Ontap, published on 7 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-7853 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-2015-7853/ (Markdown: https://insights.sbomify.com/CVE-2015-7853/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-7853
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-7853
- OSV: https://osv.dev/vulnerability/CVE-2015-7853

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-7853/
Summaries are generated and may contain mistakes; the official description above is the record.