cve/2021/CVE-2021-3537.md

### [CVE-2021-3537](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3537)
![](https://img.shields.io/static/v1?label=Product&message=libxml2&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=libxml2%202.9.11%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-476&color=brightgreen)

### Description

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/Exein-io/kepler