---
title: "CVE-2018-10811\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-2018-10811?format=md
keywords: index, follow
---

# CVE-2018-10811

Publication date 28 May 2018

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-10811?format=md#impact-score)

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## Description

strongSwan 5.6.0 and older allows Remote Denial of Service because of
Missing Initialization of a Variable.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| strongswan | 18.04 LTS bionic | Fixed 5.6.2-1ubuntu2.2 |
| 17.10 artful | Ignored end of life |
| 16.04 LTS xenial | Fixed 5.3.5-1ubuntu3.7 |
| 14.04 LTS trusty | Fixed 5.1.2-0ubuntu2.10 |

---

* [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**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10811)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-10811)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-10811)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-10811)

### Related Ubuntu Security Notices (USN)

+ [USN-3771-1](https://usn.ubuntu.com/USN-3771-1)
+ strongSwan vulnerabilities
+ 25 September 2018

### Other references

* <https://www.strongswan.org/blog/2018/05/28/strongswan-5.6.3-released.html>
* <https://www.strongswan.org/blog/2018/05/28/strongswan-vulnerability-(cve-2018-10811).html>
* <https://www.cve.org/CVERecord?id=CVE-2018-10811>