---
title: "CVE-2019-17006\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-2019-17006?format=md
keywords: index, follow
---

# CVE-2019-17006

Publication date 31 December 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2019-17006?format=md#impact-score)

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## Description

In Network Security Services (NSS) before 3.46, several cryptographic
primitives had missing length checks. In cases where the application
calling the library did not perform a sanity check on the inputs it could
result in a crash due to a buffer overflow.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nss | 19.10 eoan | Fixed 2:3.45-1ubuntu2.2 |
| 19.04 disco | Fixed 2:3.42-1ubuntu2.5 |
| 18.04 LTS bionic | Fixed 2:3.35-2ubuntu2.7 |
| 16.04 LTS xenial | Fixed 2:3.28.4-0ubuntu0.16.04.10 |
| 14.04 LTS trusty | Fixed 2:3.28.4-0ubuntu0.14.04.5+esm4  Ubuntu Pro |

---

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

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## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17006)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-17006)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-17006)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-17006)

### Related Ubuntu Security Notices (USN)

+ [USN-4231-1](https://usn.ubuntu.com/USN-4231-1)
+ NSS vulnerability
+ 8 January 2020

### Other references

* <https://hg.mozilla.org/projects/nss/rev/dfd6996fe7425eb0437346d11a01082f16fcfe34>
* <https://hg.mozilla.org/projects/nss/rev/9d1f5e71773d4e3146524096d74cb96c8df51abe>
* <https://www.cve.org/CVERecord?id=CVE-2019-17006>