---
title: "CVE-2019-20917\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-2019-20917?format=md
keywords: index, follow
---

# CVE-2019-20917

Publication date 11 September 2020

Last updated 25 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-2019-20917?format=md#impact-score)

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## Description

An issue was discovered in InspIRCd 2 before 2.0.28 and 3 before 3.3.0. The
mysql module contains a NULL pointer dereference when built against
mariadb-connector-c 3.0.5 or newer. When combined with the sqlauth or
sqloper modules, this vulnerability can be used for remote crashing of an
InspIRCd server by any user able to connect to a server.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| inspircd | 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 |
| 18.04 LTS bionic | Fixed 2.0.24-1ubuntu1+esm1  Ubuntu Pro |
| 16.04 LTS xenial | Fixed 2.0.20-5ubuntu0.1~esm1  Ubuntu Pro |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2019-20917?format=md#patch-details)

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### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| inspircd | * Upstream:   [2cc35d8](https://github.com/inspircd/inspircd/commit/2cc35d8625b7ea5cbd1d1ebb116aff86c5280162) * Upstream:   [8745660](https://github.com/inspircd/inspircd/commit/8745660fcdac7c1b80c94cfc0ff60928cd4dd4b7) * Upstream:   [2cc35d8](https://github.com/inspircd/inspircd/commit/2cc35d8625b7ea5cbd1d1ebb116aff86c5280162) * Upstream:   [8745660](https://github.com/inspircd/inspircd/commit/8745660fcdac7c1b80c94cfc0ff60928cd4dd4b7) |

## 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 | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

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

**Vector:** CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20917)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-20917)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-20917)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-20917)

### Related Ubuntu Security Notices (USN)

+ [USN-7405-1](https://usn.ubuntu.com/USN-7405-1)
+ InspIRCd vulnerabilities
+ 2 April 2025

### Other references

* <https://docs.inspircd.org/security/2019-02/>
* <https://www.cve.org/CVERecord?id=CVE-2019-20917>