cve/2018/CVE-2018-1336.md

### [CVE-2018-1336](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1336)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20Tomcat&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Denial%20of%20Service&color=brighgreen)

### Description

An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuapr2020.html

#### Github
- https://github.com/ilmari666/cybsec
- https://github.com/tomoyamachi/gocarts
- https://github.com/vshaliii/Basic-Pentesting-2-Vulnhub-Walkthrough