---
title: "CVE-2017-15093\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-2017-15093?format=md
keywords: index, follow
---

# CVE-2017-15093

Publication date 23 January 2018

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-15093?format=md#impact-score)

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## Description

When api-config-dir is set to a non-empty value, which is not the case by
default, the API in PowerDNS Recursor 4.x up to and including 4.0.6 and 3.x
up to and including 3.7.4 allows an authorized user to update the
Recursor's ACL by adding and removing netmasks, and to configure forward
zones. It was discovered that the new netmask and IP addresses of forwarded
zones were not sufficiently validated, allowing an authenticated user to
inject new configuration directives into the Recursor's configuration.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| pdns-recursor | 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 | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 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**

5.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15093)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-15093)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-15093)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-15093)

### Other references

* <https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-06.html>
* <https://downloads.powerdns.com/patches/2017-06/>
* <https://www.cve.org/CVERecord?id=CVE-2017-15093>