---
title: "CVE-2018-4058\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-2018-4058?format=md
keywords: index, follow
---

# CVE-2018-4058

Publication date 21 March 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.7 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-4058?format=md#impact-score)

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## Description

An exploitable unsafe default configuration vulnerability exists in the
TURN server functionality of coTURN prior to 4.5.0.9. By default, the TURN
server allows relaying external traffic to the loopback interface of its
own host. This can provide access to other private services running on that
host, which can lead to further attacks. An attacker can set up a relay
with a loopback address as the peer on an affected TURN server to trigger
this vulnerability.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| coturn | 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Fixed 4.5.0.7-1ubuntu2.18.10.1 |
| 18.04 LTS bionic | Fixed 4.5.0.7-1ubuntu2.18.04.1 |
| 16.04 LTS xenial | Fixed 4.5.0.3-1ubuntu0.2 |
| 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**

7.7 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.7 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4058)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-4058)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-4058)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-4058)

### Other references

* <https://www.debian.org/security/2019/dsa-4373>
* <https://www.cve.org/CVERecord?id=CVE-2018-4058>