由于 Apache Commons Fileupload 文件上传组件的问题，导致全系的 Tomcat 版本存在 DoS 安全漏洞。所影响的版本包括：
- - Commons FileUpload 1.0 to 1.3 - - Apache Tomcat 8.0.0-RC1 to 8.0.1 - - Apache Tomcat 7.0.0 to 7.0.50 - - Apache Tomcat 6 and earlier are not affected
解决该漏洞的方法：
- - Upgrade to Apache Commons FileUpload 1.3.1 or later once released - - Upgrade to Apache Tomcat 8.0.2 or later once released - - Upgrade to Apache Tomcat 7.0.51 or later once released - - Apply the appropriate patch - Commons FileUpload: http://svn.apache.org/r1565143 - Tomcat 8: http://svn.apache.org/r1565163 - Tomcat 7: http://svn.apache.org/r1565169 - - Limit the size of the Content-Type header to less than 4091 bytes
该漏洞的详细描述请看 这里 。