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HistoryFeb 28, 2020 - 1:10 a.m.

Potential HTTP request smuggling in Apache Tomcat

2020-02-2801:10:48
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osv.dev
88

EPSS

0.002

Percentile

62.2%

In Apache 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.

References