CVE-2023-34050 – Medium – CVE-2023-34050 Spring AMQP Deserialization Vulnerability

Spring Security Advisory

In 2016, allowed list patterns for deserializable class names were added to Spring AMQP, allowing users to lock down deserialization of data in messages from untrusted sources; however by default, when no allowed list was provided, all classes could be deserialized.

Specifically, and application is vulnerable if

  • the SimpleMessageConverter or SerializerMessageConverter is used
  • the user does not configure allowed list patterns
  • untrusted message originators gain permissions to write messages to the RabbitMQ broker to send malicious content