---
title: "CVE-2017-15091\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-2017-15091?format=md
keywords: index, follow
---

# CVE-2017-15091

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

**7.1 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-15091?format=md#impact-score)

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## Description

An issue has been found in the API component of PowerDNS Authoritative 4.x
up to and including 4.0.4 and 3.x up to and including 3.4.11, where some
operations that have an impact on the state of the server are still allowed
even though the API has been configured as read-only via the api-readonly
keyword. This missing check allows an attacker with valid API credentials
to flush the cache, trigger a zone transfer or send a NOTIFY.

## 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 | 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**

7.1 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.1 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15091)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-15091)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-15091)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-15091)

### Other references

* <https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2017-04.html>
* <https://downloads.powerdns.com/patches/2017-04/>
* <https://www.cve.org/CVERecord?id=CVE-2017-15091>