---
title: "CVE-2018-16877\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-2018-16877?format=md
keywords: index, follow
---

# CVE-2018-16877

Publication date 17 April 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-16877?format=md#impact-score)

Toggle side navigation

## Description

A flaw was found in the way pacemaker's client-server authentication was
implemented in versions up to and including 2.0.0. A local attacker could
use this flaw, and combine it with other IPC weaknesses, to achieve local
privilege escalation.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| pacemaker | 19.04 disco | Fixed 1.1.18-2ubuntu1.19.04.1 |
| 18.10 cosmic | Fixed 1.1.18-2ubuntu1.18.10.1 |
| 18.04 LTS bionic | Fixed 1.1.18-0ubuntu1.1 |
| 16.04 LTS xenial | Fixed 1.1.14-2ubuntu1.6 |
| 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**

7.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16877)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-16877)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-16877)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-16877)

### Related Ubuntu Security Notices (USN)

+ [USN-3952-1](https://usn.ubuntu.com/USN-3952-1)
+ Pacemaker vulnerabilities
+ 23 April 2019

### Other references

* <https://www.openwall.com/lists/oss-security/2019/04/17/1>
* <https://github.com/ClusterLabs/pacemaker/pull/1750>
* <https://www.cve.org/CVERecord?id=CVE-2018-16877>