# CVE-2019-10203: Integer overflow in pdns

> An attacker can cause a denial of service by triggering an integer overflow in the PowerDNS Authoritative daemon during slave notifications.

- **Severity:** Medium 4.3 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** Yes
- **Published:** 22 Nov 2019
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-10203, GHSA-8qrj-mmp7-pp63, UBUNTU-CVE-2019-10203

## What is CVE-2019-10203?

CVE-2019-10203 is a medium-severity vulnerability in Red Hat pdns, published on 22 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PowerDNS Authoritative daemon , pdns versions 4.0.x before 4.0.9, 4.1.x before 4.1.11, exiting when encountering a serial between 2^31 and 2^32-1 while trying to notify a slave leads to DoS.

Weakness: CWE-681 (Incorrect Conversion between Numeric Types)

## Which versions are affected by CVE-2019-10203?

It affects 1 product.


Products: Powerdns Authoritative Server.

## How do I fix CVE-2019-10203?

Upgrade to a fixed version.

## Is CVE-2019-10203 being exploited?

There is no known exploitation of CVE-2019-10203 in the wild and no public exploit code.

## Other vulnerabilities in Red Hat pdns

- [CVE-2021-36754](https://insights.sbomify.com/CVE-2021-36754/): Denial of service in n/a (high 7.5)
- [CVE-2008-3337](https://insights.sbomify.com/CVE-2008-3337/): Other in n/a (medium 6.4)
- [CVE-2012-0206](https://insights.sbomify.com/CVE-2012-0206/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10203 and fix it if it is affected.

What it is: CVE-2019-10203 is a medium-severity vulnerability in Red Hat pdns, published on 22 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-10203 in the wild and no public exploit code.

Affected product: Red Hat pdns. 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-2019-10203/ (Markdown: https://insights.sbomify.com/CVE-2019-10203/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10203
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10203
- OSV: https://osv.dev/vulnerability/CVE-2019-10203

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-10203/
Summaries are generated and may contain mistakes; the official description above is the record.