CVE-2021-30179

Summary

Apache Dubbo prior to 2.6.9 and 2.7.9 by default supports generic calls to arbitrary methods exposed by provider interfaces. These invocations are handled by the GenericFilter which will find the service and method specified in the first arguments of the invocation and use the Java Reflection API to make the final call. The signature for the $invoke or $invokeAsync methods is Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/Object; where the first argument is the name of the method to invoke, the second one is an array with the parameter types for the method being invoked and the third one is an array with the actual call arguments. In addition, the caller also needs to set an RPC attachment specifying that the call is a generic call and how to decode the arguments. The possible values are: - true - raw.return - nativejava - bean - protobuf-json An attacker can control this RPC attachment and set it to nativejava to force the java deserialization of the byte array located in the third argument.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache DubboApache Dubbo 2.7.x < 2.7.9affected
Apache Software FoundationApache DubboApache Dubbo 2.6.x < 2.6.9affected

Weaknesses

  • Remote Code Execution

ADP Enrichment

CVE Program Container

Additional References

References