---
title: "CVE-2019-6442\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-2019-6442?format=md
keywords: index, follow
---

# CVE-2019-6442

Publication date 16 January 2019

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-2019-6442?format=md#impact-score)

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## Description

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker
can write one byte out of bounds in ntpd via a malformed config request,
related to config\_remotely in ntp\_config.c, yyparse in ntp\_parser.tab.c,
and yyerror in ntp\_parser.y.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ntpsec | 18.10 cosmic | Fixed 1.1.1+dfsg1-2ubuntu0.1 |
| 18.04 LTS bionic | Fixed 1.1.0+dfsg1-1ubuntu0.2 |
| 16.04 LTS xenial | Not in release |
| 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 | 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:3.0/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-2019-6442)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-6442)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-6442)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-6442)

### Other references

* <https://dumpco.re/blog/ntpsec-bugs>
* <https://dumpco.re/bugs/ntpsec-authed-oobwrite>
* <https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS>
* <https://www.exploit-db.com/exploits/46178/>
* <https://www.cve.org/CVERecord?id=CVE-2019-6442>