CVE-2019-16942: Improper Input Validation

October 1, 2019 (updated October 8, 2019)

A Polymorphic Typing issue was discovered in FasterXML jackson-databind. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the commons-dbcp jar in the classpath, and an attacker can find an RMI service endpoint to access, it is possible to make the service execute a malicious payload. This issue exists because of org.apache.commons.dbcp.datasources.SharedPoolDataSource and org.apache.commons.dbcp.datasources.PerUserPoolDataSource mishandling.

References

nvd.nist.gov/vuln/detail/CVE-2019-16942

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