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CVE-2019-12384

Description

A flaw was discovered in FasterXML jackson-databind in versions prior to 2.9.9. The vulnerability would permit polymorphic deserialization of malicious objects using the logback-core gadget when used in conjunction with polymorphic type handling methods such as `enableDefaultTyping()` or when @JsonTypeInfo is using `Id.CLASS` or `Id.MINIMAL_CLASS` or in any other way which ObjectMapper.readValue might instantiate objects from unsafe sources. Depending on the classpath content, remote code execution may be possible. #### Mitigation The following conditions are needed for an exploit, we recommend avoiding all if possible: * Deserialization from sources you do not control * `enableDefaultTyping()` * `@JsonTypeInfo using `id.CLASS` or `id.MINIMAL_CLASS`


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