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CVE-2020-1935 - HTTP Request Smuggling - incorrect header parsing



In Apache TomEE versions 8.0.0-M1 to 8.0.1, 7.1.0 to 7.1.2 and 7.0.0-M1 to 7.0.7 and 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.


Apache Tomcat & Apache TomEE

Versions affected

Apache Tomcat

Tomcat 6.x
Tomcat 7.x
7.0.0 to 7.0.99
Tomcat 8.0.x
Tomcat 8.5.x
8.5.0 to 8.5.50
Tomcat 9.x
9.0.0.M1 to

Apache TomEE

TomEE 1.7.x
TomEE 7.0.x
7.0.0-M1 to 7.0.7
TomEE 7.1.x
7.1.0 to 7.1.2
TomEE 8.0.x
8.0.0-M1 to 8.0.1
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