A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the apache-log4j-extra (version 1.2.x) jar in the classpath, and an attacker can provide a JNDI service to access, it is possible to make the service execute a malicious payload.
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "2.4.2-3ubuntu0.1~esm2", "binary_name": "libjackson2-databind-java" }, { "binary_version": "2.4.2-3ubuntu0.1~esm2", "binary_name": "libjackson2-databind-java-doc" } ] }