Julien Zhan

Name of the Vulnerable Software and Affected Versions: MySQL Client versions 5.6.50 and prior MySQL Client versions 5.7.32 and prior MySQL Client versions 8.0.22 and prior Description: The issue is related to insufficient access control in the C API component of the MySQL Client. It can be exploited by a remote attacker to cause a denial of service using the MySQL protocol. A successful attack can result in unauthorized access to update, insert, or delete some MySQL Client accessible data, as well as cause a partial denial of service of MySQL Client. Recommendations: For versions 5.6.50 and prior, update to a version later than 5.6.50 to resolve the issue. For versions 5.7.32 and prior, update to a version later than 5.7.32 to resolve the issue. For versions 8.0.22 and prior, update to a version later than 8.0.22 to resolve the issue. As a temporary workaround, consider restricting network access to the MySQL Client to minimize the risk of exploitation.

Name of the Vulnerable Software and Affected Versions: MySQL Server versions 5.6.49 and prior MySQL Server versions 5.7.31 and prior MySQL Server versions 8.0.21 and prior Description: The issue is related to insufficient input validation in the MySQL Server component, specifically in the DDL subcomponent. This can be exploited by a remote attacker to cause a denial of service, resulting in the ability to hang or crash the MySQL Server. The attack can be performed via multiple protocols and requires high privileges. The estimated number of potentially affected devices is not specified. Recommendations: For MySQL Server versions 5.6.49 and prior, update to a version later than 5.6.49 to resolve the issue. For MySQL Server versions 5.7.31 and prior, update to a version later than 5.7.31 to resolve the issue. For MySQL Server versions 8.0.21 and prior, update to a version later than 8.0.21 to resolve the issue. As a temporary workaround, consider restricting network access to the MySQL Server to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** MySQL Server versions 8.0.20 and prior **Description** The issue is related to insufficient access control in the InnoDB component of the MySQL Server. It can be exploited by a remote attacker to cause a denial of service using the MySQL protocol. Successful attacks can result in the ability to cause a hang or frequently repeatable crash of the MySQL Server. **Recommendations** For versions 8.0.20 and prior, update to a version that contains a fix for this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Name of the Vulnerable Software and Affected Versions: MySQL Server versions 5.7.30 and prior MySQL Server versions 8.0.20 and prior Description: The issue is related to insufficient input validation in the Server: Pluggable Auth component of MySQL Server. This allows an attacker with network access via multiple protocols to compromise the server. Successful attacks can result in unauthorized update, insert, or delete access to some of MySQL Server's accessible data. Recommendations: For versions 5.7.30 and prior, update to a version later than 5.7.30 to resolve the issue. For versions 8.0.20 and prior, update to a version later than 8.0.20 to resolve the issue. As a temporary workaround, consider restricting access to the `Server: Pluggable Auth` component until a patch is available.

Name of the Vulnerable Software and Affected Versions: MySQL Client versions 8.0.19 and prior Description: The issue is related to insufficient access control in the C API component of the MySQL Client product. It allows a low-privileged attacker with network access via multiple protocols to compromise the MySQL Client. Successful attacks can result in the unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of the MySQL Client. Recommendations: For versions 8.0.19 and prior, update to a version that contains a fix for this issue to prevent potential exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** MySQL Client versions 5.7.28 and prior MySQL Client versions 8.0.18 and prior **Description** The issue is related to insufficient access control in the MySQL Client's C API, which can be exploited by a remote attacker to cause a denial of service using the MySQL network protocol. This can result in the ability to cause a hang or frequently repeatable crash of the MySQL Client, leading to a complete denial of service. **Recommendations** For versions 5.7.28 and prior, update to a version later than 5.7.28 to resolve the issue. For versions 8.0.18 and prior, update to a version later than 8.0.18 to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** MySQL Client versions 5.7.28 and prior MySQL Client versions 8.0.18 and prior **Description** The issue is related to insufficient access control in the C API component of the MySQL Client. It can be exploited by a remote attacker to cause a denial of service using the MySQL network protocol. The attacker, who does not need to be authenticated, can compromise the MySQL Client, resulting in the ability to cause it to hang or crash repeatedly, leading to a complete denial of service. **Recommendations** For versions 5.7.28 and prior, update to a version later than 5.7.28 to resolve the issue. For versions 8.0.18 and prior, update to a version later than 8.0.18 to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** MySQL Client versions 5.7.32 and prior MySQL Client versions 8.0.22 and prior **Description** The issue is related to the C API component of the MySQL Client product, which allows an unauthenticated attacker with network access via multiple protocols to compromise the MySQL Client. Successful attacks can result in the unauthorized ability to cause a hang or frequently repeatable crash of the MySQL Client, leading to a denial of service. The vulnerability is difficult to exploit and can be triggered remotely. **Recommendations** For MySQL Client versions 5.7.32 and prior, update to a version later than 5.7.32 to resolve the issue. For MySQL Client versions 8.0.22 and prior, update to a version later than 8.0.22 to resolve the issue. As a temporary workaround, consider restricting network access to the MySQL Client to minimize the risk of exploitation.

Name of the Vulnerable Software and Affected Versions: MySQL Client versions 5.6.48 and prior MySQL Client versions 5.7.30 and prior MySQL Client versions 8.0.20 and prior Description: The issue is related to insufficient input validation in the C API component of the MySQL Client product. It allows a low-privileged attacker with network access via multiple protocols to compromise the MySQL Client. Successful attacks can result in the unauthorized ability to cause a hang or frequently repeatable crash of the MySQL Client. Recommendations: For versions 5.6.48 and prior, update to a version later than 5.6.48 to resolve the issue. For versions 5.7.30 and prior, update to a version later than 5.7.30 to resolve the issue. For versions 8.0.20 and prior, update to a version later than 8.0.20 to resolve the issue. As a temporary workaround, consider restricting network access to the MySQL Client to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** MySQL Client versions 5.6.46 and prior MySQL Client versions 5.7.28 and prior MySQL Client versions 8.0.18 and prior **Description** The issue is related to errors in resource release in the C API component of the MySQL Client product. It allows an unauthenticated attacker with network access via multiple protocols to compromise the MySQL Client. Successful attacks can result in the unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of the MySQL Client. The exploitation of this issue can be done remotely through the MySQL Protocol. **Recommendations** For versions 5.6.46 and prior, update to a version later than 5.6.46 to resolve the issue. For versions 5.7.28 and prior, update to a version later than 5.7.28 to resolve the issue. For versions 8.0.18 and prior, update to a version later than 8.0.18 to resolve the issue. As a temporary workaround, consider restricting network access to the MySQL Client to minimize the risk of exploitation.