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Severity
Medium
Analysis Summary
CVE-2021-33037
Apache Tomcat did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: – Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; – Tomcat honored the identify encoding; and – Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
Impact
- Bypass Security
- Unauthorized Access
Affected Vendors
Apache Tomcat
Affected Products
- BIG-IP (all modules)
- BIG-IQ Centralized Management
- Traffix SDC
Remediation
Upgrade to the latest version of Apache Tomcat available from the Apache Web site.