cve/2019/CVE-2019-17569.md

CVE-2019-17569

Description

The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.

POC

Reference

• https://www.oracle.com/security-alerts/cpujan2021.html
• https://www.oracle.com/security-alerts/cpujan2021.html
• https://www.oracle.com/security-alerts/cpujul2020.html
• https://www.oracle.com/security-alerts/cpujul2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html

Github

• https://github.com/Live-Hack-CVE/CVE-2019-17569
• https://github.com/mklmfane/betvictor
• https://github.com/mo-xiaoxi/HDiff
• https://github.com/raner/projo