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.
{
"versions": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.6.7.3"
},
{
"introduced": "2.7.0"
},
{
"fixed": "2.7.9.6"
},
{
"introduced": "2.8.0"
},
{
"fixed": "2.8.11.4"
},
{
"introduced": "2.9.0"
},
{
"fixed": "2.9.9.2"
}
]
}