# CVE-2018-4058: coturn: An exploitable unsafe default configuration vulnerability exists in the TURN server functionality of coTURN prior to...

CVE-2018-4058 is fixed in coturn on 1 platform by coturn 4.5.0.7-1ubuntu2.18.04.1 (version 4.5.0.7-1ubuntu2.18.04.1), released March 21, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-4058
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0092
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 21, 2019

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | coturn Ubuntu 18.04.6 LTS (bionic) | 4.5.0.7-1ubuntu2.18.04.1 | [coturn 4.5.0.7-1ubuntu2.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-coturn-4.5.0.7-1ubuntu2.18.04.1.md) | Mar 21, 2019 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo