### [CVE-2019-14439](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14439)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2. This occurs when Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the logback jar in the classpath.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

#### Github
- https://github.com/0xT11/CVE-POC
- https://github.com/Anonymous-Phunter/PHunter
- https://github.com/CGCL-codes/PHunter
- https://github.com/developer3000S/PoC-in-GitHub
- https://github.com/diakogiannis/moviebook
- https://github.com/galimba/Jackson-deserialization-PoC
- https://github.com/hectorgie/PoC-in-GitHub
- https://github.com/heike2718/commons
- https://github.com/ilmari666/cybsec
- https://github.com/jas502n/CVE-2019-14439
- https://github.com/seal-community/patches