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AUSCERT External Security Bulletin Redistribution
Apache Tomcat Remote Code Execution on Windows
11 April 2019
AusCERT Security Bulletin Summary
Product: Apache Tomcat
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Unknown/Unspecified
CVE Names: CVE-2019-0232
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CVE-2019-0232 Apache Tomcat Remote Code Execution on Windows
Vendor: The Apache Software Foundation
Apache Tomcat 9.0.0.M1 to 9.0.17
Apache Tomcat 8.5.0 to 8.5.39
Apache Tomcat 7.0.0 to 7.0.93
When running on Windows with enableCmdLineArguments enabled, the CGI
Servlet 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 disabled
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  and this archived
MSDN blog .
Users of affected versions should apply one of the following mitigations:
- - Ensure the CGI Servlet initialisation parameter enableCmdLineArguments
is set to false
- - Upgrade to Apache Tomcat 9.0.18 or later when released
- - Upgrade to Apache Tomcat 8.5.40 or later when released
- - Upgrade to Apache Tomcat 7.0.93 or later when released
This announcement is being made before the releases are available as the
change to fix this issue is obviously security related.
This issue was identified by an external security researcher and
reported to the Apache Tomcat security team via the bug bounty program
sponsored by the EU FOSSA-2 project.
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