Description
When running on Windows with enableCmdLineArguments enabled, the CGI Servlet in Apache Tomcat 9.0.0.M1 to 9.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 is vulnerable to Remote Code Execution due to a bug in the way the JRE passes command line arguments to Windows. The CGI Servlet is disabled by default. The CGI option enableCmdLineArguments is disable by default in Tomcat 9.0.x (and will be disabled by default in all versions in response to this vulnerability). For a detailed explanation of the JRE behaviour, see Markus Wulftange's blog (https://codewhitesec.blogspot.com/2016/02/java-and-command-line-injections-in-windows.html) and this archived MSDN blog (https://web.archive.org/web/20161228144344/https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/).
Remediation
References
https://web.archive.org/web/20161228144344/https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/
https://codewhitesec.blogspot.com/2016/02/java-and-command-line-injections-in-windows.html
http://www.securityfocus.com/bid/107906
https://security.netapp.com/advisory/ntap-20190419-0001/
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-784
http://seclists.org/fulldisclosure/2019/May/4
https://blog.trendmicro.com/trendlabs-security-intelligence/uncovering-cve-2019-0232-a-remote-code-execution-vulnerability-in-apache-tomcat/
https://wwws.nightwatchcybersecurity.com/2019/04/30/remote-code-execution-rce-in-cgi-servlet-apache-tomcat-on-windows-cve-2019-0232/
https://www.synology.com/security/advisory/Synology_SA_19_17
http://packetstormsecurity.com/files/153506/Apache-Tomcat-CGIServlet-enableCmdLineArguments-Remote-Code-Execution.html
https://access.redhat.com/errata/RHSA-2019:1712
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/security-alerts/cpuApr2021.html
https://lists.apache.org/thread.html/5f297a4b9080b5f65a05bc139596d0e437d6a539b25e31d29d028767%40%3Cannounce.tomcat.apache.org%3E
https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/673b6148d92cd7bc99ea2dcf85ad75d57da44fc322d51f37fb529a2a%40%3Ccommits.ofbiz.apache.org%3E
https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/a6c87a09a71162fd563ab1c4e70a08a103e0b7c199fc391f1c9c4c35%40%3Ccommits.ofbiz.apache.org%3E
https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/52ffb9fbf661245386a83a661183d13f1de2e5779fa23837a08e02ac%40%3Ccommits.ofbiz.apache.org%3E
https://lists.apache.org/thread.html/dd4b325cdb261183dbf5ce913c102920a8f09c26dae666a98309165b%40%3Cnotifications.ofbiz.apache.org%3E
https://lists.apache.org/thread.html/96849486813a95dfd542e1618b7923ca945508aaf4a4341f674d83e3%40%3Cnotifications.ofbiz.apache.org%3E
https://lists.apache.org/thread.html/f4d48b32ef2b6aa49c8830241a9475da5b46e451f964b291c7a0a715%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3E
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E