Apache ShardingSphere(incubator) deserialization vulnerability

Overview :

In Apache ShardingSphere(incubator) 4.0.0-RC3 and 4.0.0, the ShardingSphere’s web console uses the SnakeYAML library for parsing YAML inputs to load datasource configuration. SnakeYAML allows to unmarshal data to a Java type By using the YAML tag. Unmarshalling untrusted data can lead to security flaws of RCE.

Affected Product(s) :

ShardingSphere 4.0.0-RC3, 4.0.0

Solution :

Mitigation:
4.0.0-RC3 and 4.0.0 users should upgrade to 4.0.1

Example:
An attacker can use untrusted data to fill in the DataSource Config after
login the sharding-ui.

Credit:
This issue was discovered by WuXiong of QI`ANXIN YUNYING Labs.