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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/).

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• http://seclists.org/fulldisclosure/2019/May/4 mailing-listx_refsource_FULLDISC
• https://access.redhat.com/errata/RHSA-2019:1712 vendor-advisoryx_refsource_REDHAT
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• https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
• https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html x_refsource_MISC
• https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html x_refsource_MISC
• https://www.oracle.com/security-alerts/cpujan2020.html x_refsource_MISC
• https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
• https://codewhitesec.blogspot.com/2016/02/java-and-command-line-injections-in-windows.html x_refsource_MISC
• https://web.archive.org/web/20161228144344/https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/ x_refsource_MISC
• https://www.synology.com/security/advisory/Synology_SA_19_17 x_refsource_CONFIRM
• https://security.netapp.com/advisory/ntap-20190419-0001/ x_refsource_CONFIRM
• https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-784 x_refsource_CONFIRM
• https://blog.trendmicro.com/trendlabs-security-intelligence/uncovering-cve-2019-0232-a-remote-code-execution-vulnerability-in-apache-tomcat/ x_refsource_MISC
• https://wwws.nightwatchcybersecurity.com/2019/04/30/remote-code-execution-rce-in-cgi-servlet-apache-tomcat-on-windows-cve-2019-0232/ x_refsource_MISC
• http://packetstormsecurity.com/files/153506/Apache-Tomcat-CGIServlet-enableCmdLineArguments-Remote-Code-Execution.html x_refsource_MISC