# CVE-2018-12546: libmosquitto1: In Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) when a client publishes a retained message to a topic, then has...

CVE-2018-12546 is fixed in 4 products on 1 platform, first by libmosquitto1 1.4.15-2ubuntu0.18.04.1, released March 27, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-12546
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0080
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 27, 2019

## Description

In Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) when a client publishes a retained message to a topic, then has its access to that topic revoked, the retained message will still be published to clients that subscribe to that topic in the future. In some applications this may result in clients being able cause effects that would otherwise not be allowed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmosquitto1 Ubuntu 18.04.6 LTS (bionic) | 1.4.15-2ubuntu0.18.04.1 | [libmosquitto1 1.4.15-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmosquitto1-1.4.15-2ubuntu0.18.04.1.md) | Mar 27, 2019 |
| Linux | libmosquittopp1 Ubuntu 18.04.6 LTS (bionic) | 1.4.15-2ubuntu0.18.04.1 | [libmosquittopp1 1.4.15-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmosquittopp1-1.4.15-2ubuntu0.18.04.1.md) | Mar 27, 2019 |
| Linux | mosquitto Ubuntu 18.04.6 LTS (bionic) | 1.4.15-2ubuntu0.18.04.1 | [mosquitto 1.4.15-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mosquitto-1.4.15-2ubuntu0.18.04.1.md) | Mar 27, 2019 |
| Linux | mosquitto-clients Ubuntu 18.04.6 LTS (bionic) | 1.4.15-2ubuntu0.18.04.1 | [mosquitto-clients 1.4.15-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mosquitto-clients-1.4.15-2ubuntu0.18.04.1.md) | Mar 27, 2019 |

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