### [CVE-2021-27807](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27807)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20PDFBox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Apache%20PDFBox%3C%3D%202.0.22%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-834%20Excessive%20Iteration&color=brighgreen)

### Description

A carefully crafted PDF file can trigger an infinite loop while loading the file. This issue affects Apache PDFBox version 2.0.22 and prior 2.0.x versions.

### POC

#### Reference
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html

#### Github
- https://github.com/0xCyberY/CVE-T4PDF
- https://github.com/ARPSyndicate/cvemon
- https://github.com/CodeIntelligenceTesting/jazzer
- https://github.com/msft-mirror-aosp/platform.external.jazzer-api