# CVE-2019-2923: libmysqlclient21: Vulnerability in the MySQL Server product of Oracle MySQL (component:Server: Security: Encryption)

CVE-2019-2923 is fixed in 18 products on 1 platform, first by libmysqlclient20 5.7.28-0ubuntu0.18.04.4, released October 16, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-2923
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0215
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 16, 2019

## Description

Vulnerability in the MySQL Server product of Oracle MySQL (component:Server: Security: Encryption). Supported versions that are affected are5.6.45 and prior and 5.7.27 and prior. Easily exploitable vulnerabilityallows unauthenticated attacker with network access via multiple protocolsto compromise MySQL Server. Successful attacks of this vulnerability canresult in unauthorized read access to a subset of MySQL Server accessibledata. CVSS 3.0 Base Score 5.3 (Confidentiality impacts). CVSS Vector:(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmysqlclient20 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [libmysqlclient20 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmysqlclient20-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | libmysqlclient21 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [libmysqlclient21 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmysqlclient21-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | libmysqlclient21 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [libmysqlclient21 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libmysqlclient21-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-client Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-client 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-client Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-client 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-client Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-client 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-client-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-client-5.7 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-client-8.0 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-client-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-client-8.0 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-client-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-client-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-client-core-5.7 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-core-5.7-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-client-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-client-core-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-core-8.0-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-client-core-8.0 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-client-core-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-core-8.0-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-router Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-router 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-router-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-router Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-router 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-router-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-server Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-server 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-server Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-server 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-server Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-server 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-server-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-server-5.7 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-server-8.0 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-server-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-server-8.0 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-server-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-server-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-server-core-5.7 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-core-5.7-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-server-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-server-core-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-core-8.0-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-server-core-8.0 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-server-core-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-core-8.0-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-source-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-source-5.7 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-source-5.7-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-source-8.0 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-source-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-source-8.0-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-source-8.0 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-source-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-source-8.0-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-testsuite Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-testsuite 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-testsuite Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-testsuite 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-testsuite Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-testsuite 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0.18-0ubuntu3.md) | Jan 16, 2026 |
| Linux | mysql-testsuite-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.28-0ubuntu0.18.04.4 | [mysql-testsuite-5.7 5.7.28-0ubuntu0.18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7-5.7.28-0ubuntu0.18.04.4.md) | Oct 16, 2019 |
| Linux | mysql-testsuite-8.0 Ubuntu 20.04 LTS (focal) | 8.0.18-0ubuntu3 | [mysql-testsuite-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0-8.0.18-0ubuntu3.md) | Oct 16, 2019 |
| Linux | mysql-testsuite-8.0 Ubuntu 24.10 (oracular) | 8.0.18-0ubuntu3 | [mysql-testsuite-8.0 8.0.18-0ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0-8.0.18-0ubuntu3.md) | Jan 16, 2026 |

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