CVEs-PoC/2021/CVE-2021-41079.md

### [CVE-2021-41079](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41079)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20Tomcat&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Apache%20Tomcat%2010%2010.0.0-M1%20to%2010.0.2%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=Apache%20Tomcat%208.5%208.5.0%20to%208.5.63%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=Apache%20Tomcat%209%209.0.0-M1%20to%209.0.43%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20%20Improper%20Input%20Validation&color=brightgreen)

### Description

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/chnzzh/OpenSSL-CVE-lib
- https://github.com/m3n0sd0n4ld/uCVE
- https://github.com/versio-io/product-lifecycle-security-api