# CVE-2017-3635: libmysqlclient20: Vulnerability in the MySQL Connectors component of Oracle MySQL (subcomponent: Connector/C)

CVE-2017-3635 is fixed in 10 products on 1 platform, first by libmysqlclient20 5.7.19-0ubuntu1, released July 23, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-3635
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0203
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 18, 2017

## Description

Vulnerability in the MySQL Connectors component of Oracle MySQL (subcomponent: Connector/C). Supported versions that are affected are 6.1.10 and earlier. Difficult to exploit vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Connectors. Note: The documentation has also been updated for the correct way to use mysql_stmt_close(). Please see: https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-execute.html, https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-fetch.html, https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-close.html, https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-error.html, https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-errno.html, and https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-sqlstate.html. CVSS 3.0 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmysqlclient20 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [libmysqlclient20 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmysqlclient20-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-client Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-client 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-client-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-client-5.7 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-client-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-client-core-5.7 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-core-5.7-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-server Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-server 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-server-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-server-5.7 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-server-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-server-core-5.7 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-core-5.7-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-source-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-source-5.7 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-source-5.7-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-testsuite Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-testsuite 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7.19-0ubuntu1.md) | Jul 23, 2019 |
| Linux | mysql-testsuite-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.19-0ubuntu1 | [mysql-testsuite-5.7 5.7.19-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7-5.7.19-0ubuntu1.md) | Jul 23, 2019 |

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Data as of 2026-11-07T06:34:28Z 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