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) :
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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.
