---
title: "CVE-2019-3871\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2019-3871?format=md
keywords: index, follow
---

# CVE-2019-3871

Publication date 21 March 2019

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2019-3871?format=md#impact-score)

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## Description

A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and
before 4.1.7. An insufficient validation of data coming from the user when
building a HTTP request from a DNS query in the HTTP Connector of the
Remote backend, allowing a remote user to cause a denial of service by
making the server connect to an invalid endpoint, or possibly information
disclosure by making the server connect to an internal endpoint and somehow
extracting meaningful information about the response

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| pdns | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Vulnerable |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | Low |
  | Integrity impact | None |
  | Availability impact | Low |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3871)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-3871)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-3871)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-3871)

### Other references

* <https://github.com/PowerDNS/pdns/issues/7573>
* <https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2019-03.html>
* <https://www.cve.org/CVERecord?id=CVE-2019-3871>