# CVE-2019-10163: Denial of service in pdns

> A remote authorized master server can cause high CPU load or block slave zone updates in PowerDNS by sending excessive NOTIFY messages.

- **Severity:** Low 3.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 30 Jul 2019
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-10163, GHSA-25qr-4mfj-987c, UBUNTU-CVE-2019-10163

## What is CVE-2019-10163?

CVE-2019-10163 is a low-severity denial of service vulnerability in Opensuse Backports, published on 30 Jul 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A Vulnerability has been found in PowerDNS Authoritative Server before versions 4.1.9, 4.0.8 allowing a remote, authorized master server to cause a high CPU load or even prevent any further updates to any slave zone by sending a large number of NOTIFY messages. Note that only servers configured as slaves are affected by this issue.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2019-10163?

It affects 3 products.


Products: Opensuse Backports, Opensuse Leap, Powerdns Authoritative.

## How do I fix CVE-2019-10163?

Upgrade to a fixed version.

## Is CVE-2019-10163 being exploited?

There is no known exploitation of CVE-2019-10163 in the wild and no public exploit code.

## Other vulnerabilities in Opensuse Backports

- [CVE-2019-14524](https://insights.sbomify.com/CVE-2019-14524/): Memory corruption in n/a (high 7.8)
- [CVE-2020-10592](https://insights.sbomify.com/CVE-2020-10592/): Denial of service in n/a (high 7.5)
- [CVE-2019-5459](https://insights.sbomify.com/CVE-2019-5459/): Integer overflow in VLC (high 7.1)
- [CVE-2019-5163](https://insights.sbomify.com/CVE-2019-5163/): Denial of service in Shadowsocks (medium 5.9)
- [CVE-2019-20053](https://insights.sbomify.com/CVE-2019-20053/): Null dereference in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10163 and fix it if it is affected.

What it is: CVE-2019-10163 is a low-severity denial of service vulnerability in Opensuse Backports, published on 30 Jul 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-10163 in the wild and no public exploit code.

Affected product: Opensuse Backports. 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-2019-10163/ (Markdown: https://insights.sbomify.com/CVE-2019-10163/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10163
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10163
- OSV: https://osv.dev/vulnerability/CVE-2019-10163

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-10163/
Summaries are generated and may contain mistakes; the official description above is the record.