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Rewterz Threat Advisory –CVE-2021-33037 – Apache Tomcat Security Vulnerability

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.

https://support.f5.com/csp/article/K32469285