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.
Remediation
References
Related Vulnerabilities
Apache HTTP Server Out-of-bounds Write Vulnerability (CVE-2004-0488)
Internet Information Services Other Vulnerability (CVE-2001-0333)
Apache Tomcat Permissions, Privileges, and Access Controls Vulnerability (CVE-2011-2729)
Oracle Database Server Other Vulnerability (CVE-2001-0943)
Magento Incorrect Authorization Vulnerability (CVE-2022-34256)