Parses URL parameters and translates them into command line arguments. The actual execution of the CGI scripts happens via Java Runtime Environment (JRE)’s java.lang.Runtime class, exec function. When CGI support is enabled in Apache Tomcat in Windows, and command line argument passing is enabled, it is possible to cause command. Our application server (Apache Tomcat Plume) that use jta-managed data source through tomee.xml file should access database server just in secure (HTTPS) mode with two way ssl or client authenticat.
//ES// Edit service configuration: This is the default operation. It is called if the no option is provided but the executable is renamed to servicenameW.exe //MS//. EnableCmdLineArguments setting is set to true, a remote user can abuse this to execute system commands, and gain remote code execution. When using the CGI Servlet on Windows with enableCmdLineArguments enabled, review the setting of cmdLineArgumentsDecoded carefully and ensure that it is appropriate for your environment. The default value is secure.
Command Prompt is the tool in Windows which allows users to interact with their computer from a character user interface(CUI). It allows users to bypass most restrictions that are enforced on the Windows explorer based GUI. Hence, it can also be used to remove viruses and malware and also undo their effects. To avoid this, most viruses disable command prompt. Some administrators also purposefully disable it to avoid users changing critical settings of the computer.In these situations, if you run the command prompt (cmd.exe), you will get an error saying 'The command prompt has been disabled by your Administrator'. However, there are ways in which you can re-enable it. This article contains some such few simple techniques using which you can easily enable the command prompt.
Enable Command Prompt using the Group Policy Editor
1) Click on Start. Go to Run. Users running Windows 10, Windows 8, Windows 7 or Vista, go to Search. Alternatively, use Windows key+R keyboard shortcut.2) Type gpedit.msc and press Enter.
3) Navigate to User Configuration/ Administrative Templates / System.
4) In the work area on the right side, double click on 'Prevent access to the command prompt'.
5) In the popup dialog, encircle Disabled and click OK.
6) You should be able to immediately use the command prompt. If you still cannot access it, restart your computer.
![Windows 10 cmd arguments Windows 10 cmd arguments](/uploads/1/3/7/7/137789355/599654233.png)
Home editions of Windows do not contain the Group Policy Editor.
Enable Command Prompt from Registry in Windows 10, Windows 8, 7, or XP
Registry Editor is an in-built tool in Windows which is used to view and edit the Windows registry. You can use it to easily enable the command prompt by simply modifying a registry key. To do so, follow these steps.1) Users running Windows 8, Windows 7 and Windows Vista, go to Start>Search. Users of Windows 10, go to Start>Search.
2) Type regedit and press Enter.
3) Registry Editor will start. If it is disabled, you will need to enable Registry Editor first.
4) Navigate to HKEY_CURRENT_USERSoftwarePoliciesMicrosoftWindowsSystem. If the Windows key is not there, you will need to create a new key called Windows. Also, if the System key is not there, you will need to create it.
5) In the work area on right side, double click on DisableCMD and set its value to 0. If you cannot locate DisableCMD, you will need to create a new DWORD value called DisableCMD and set its value to 0.
6) Close the Registry Editor.
The Command Prompt in Windows 8 |
The command prompt should immediately be accessible. If it isn't, restart your computer.
Enable Command Prompt by simply running a command
If you are unfamiliar with directly editing the Registry, you can use a simple command to quickly enable the command prompt. Just follow these steps:-1) Click on Start and go to Run. Users of Windows 10, Windows 8.1, Windows 8, Windows 7 and Windows Vista, go to Search.
2) Copy and paste the following command and execute it.
REG add HKCUSoftwarePoliciesMicrosoftWindowsSystem /v DisableCMD /t REG_DWORD /d 0 /f3) This should enable the command prompt. If it is still not enabled, restart your computer.
The methods mentioned in this article work on
![Enablecmdlinearguments Enablecmdlinearguments](/uploads/1/3/7/7/137789355/700931232.png)
A remote code execution flaw impacting Apache Tomcat was fixed by the Apache Software Foundation to prevent potential remote attackers to exploit vulnerable servers and take control of affected systems.
The Apache Tomcat software (also known as the Tomcat Server) is an open source implementation for Java EE specifications such as the Java Servlet, Java Expression Language, JavaServer Pages, and Java WebSocket technologies, providing an HTTP web server designed to allow Java-based code to run.
The Apache Tomcat issue tracked as CVE-2019-0232 could allow malicious actors to execute arbitrary commands on their victims' systems by taking advantage of an OS command injection caused by an input validation error in Tomcat's CGI Servlet stemming from 'a bug in the way the JRE passes command line arguments to Windows.'
Windows installations with enableCmdLineArguments enabled are vulnerable
This issue would enable the would-be attackers to both inject and execute arbitrary commands on the impacted systems using the Apache Tomcat process' privileges by sending a maliciously crafted request to the servlet.
The OS command injection vulnerability is tracked by the Common Weakness Enumeration database as CWE-78 and it makes it possible for 'attackers to execute unexpected, dangerous commands directly on the operating system. This weakness can lead to a vulnerability in environments in which the attacker does not have direct access to the operating system, such as in web applications.'
As described by the security advisory:
Virtualization Enable Cmd
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).
As detailed above, for this important severity vulnerability to be exploitable, Apache Tomcat has to be installed on a Windows machine and have the enableCmdLineArguments option enabled.
The severity of the CVE-2019-0232 flaw is lower for systems where Apache Tomcat 9.0.x is installed seeing that the enableCmdLineArguments option will be disabled by default.
Flaw reported through an EU-FOSSA-sponsored bug bounty
The Tomcat versions impacted by this remote code execution vulnerability are:
• 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 Python sleep 1 second.
• 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 Python sleep 1 second.
The Apache Software Foundation (ASF) released the following patched versions:
• Apache Tomcat 9.0.18 and later
• Apache Tomcat 8.5.40 and later
• Apache Tomcat 7.0.94 and later
• Apache Tomcat 9.0.18 and later
• Apache Tomcat 8.5.40 and later
• Apache Tomcat 7.0.94 and later
ASF also provides mitigation measures, advising all users of affected Apache Tomcat versions to 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
• Upgrade to Apache Tomcat 8.5.40 or later
• Upgrade to Apache Tomcat 7.0.93 or later
• Ensure the CGI Servlet initialisation parameter enableCmdLineArguments is set to false
• Upgrade to Apache Tomcat 9.0.18 or later
• Upgrade to Apache Tomcat 8.5.40 or later
• Upgrade to Apache Tomcat 7.0.93 or later
The CVE-2019-0232 vulnerability was discovered in Apache Tomcat by Nightwatch Cybersecurity Research who reported it to ASF's security team through the Intigriti/Deloitte bug bounty platform sponsored by the European Union's FOSSA-2 project, with total rewards of €39,000 and taking place between January 30 and October 15.
Update April 15 17:46 EDT: Added Nightwatch Cybersecurity Research as the group which reported the vulnerability to the ASF.