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GHSA-4vww-mc66-62m6

HTTP Request Smuggling in Apache Tomcat

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-33037

Packages

EcosystemPackageAffectedFixed in
Maven org.apache.tomcat:tomcat >= 10.0.0-M1, < 10.0.7 10.0.7
Maven org.apache.tomcat:tomcat >= 9.0.0-M1, < 9.0.48 9.0.48
Maven org.apache.tomcat:tomcat >= 8.5.0, < 8.5.68 8.5.68

Details

As written in the advisory (Markdown source, shown as plain text).

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 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 honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.

References

External links from the advisory. They lead to third-party sites.