A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x through 2.9.9. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has JDOM 1.x or 2.x jar in the classpath, an attacker can send a specifically crafted JSON message that allows them to read arbitrary local files on the server.
Remediation
Upgrade com.fasterxml.jackson.core:jackson-databind to version 2.9.9.1 or later. For example:
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>[2.9.9.1,)</version> </dependency>Always verify the validity and compatibility of suggestions with your codebase.
Details
CVE-2019-12814
moderate severity
*Vulnerable versions:* >= 2.0.0, < 2.9.9.1
*Patched version:* 2.9.9.1
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x through 2.9.9. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has JDOM 1.x or 2.x jar in the classpath, an attacker can send a specifically crafted JSON message that allows them to read arbitrary local files on the server.