CVEs-PoC/2020/CVE-2020-1935.md

CVE-2020-1935

Description

In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led 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/cpujul2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html

Github

• https://github.com/mklmfane/betvictor
• https://github.com/mo-xiaoxi/HDiff
• https://github.com/raner/projo
• https://github.com/versio-io/product-lifecycle-security-api
• https://github.com/vshaliii/Basic-Pentesting-2-Vulnhub-Walkthrough