Apache Tomcat suffers from a denial of service vulnerability. The checks that limited the permitted size of request headers were implemented too late in the request parsing process for the HTTP NIO connector. This enabled a malicious user to trigger an OutOfMemoryError by sending a single request with very large headers. Tomcat versions 6.0.0 through 6.0.34 and 7.0.0 through 7.0.27 are affected.
4b381434f76f5509cd4b1e048e50886bad81c0880d9575db95a7a732d9839225