Java is currently the most popular programming language in Web development, and Tomcat is one of the most popular Java middleware servers.

The GhostCat vulnerability was recently found in Apache Tomcat. Update the Apache Tomcat to latest versions 9.0.31, 8.5.51, and 7.0.100 to fix this vulnerability. The AJP protocol can be understood as a performance optimized version of the HTTP protocol in binary format. Apache Tomcat’s AJP connector is enabled by default on all Tomcat servers and listens on the server’s port 8009. The endpoint for AJP is enabled or disabled in the server.xml file. Firewalls will also assist with preventing access to the server. If the AJP Connector service is in use, we recommend that you upgrade Tomcat to version 9.0.31, 8.5.51, or 7.0.100, and then configure the “secret” attribute for the AJP Connector to set AJP protocol authentication credentials. For example: (Note that you must change the above “YOUR_TOMCAT_AJP_SECRET” to a safer value that cannot be easily guessed or cracked.). Andrew’s #1 specialty is Apache Tomcat, and he is recognized in the Tomcat community as a subject matter expert, assisting the Tomcat open source project in many ways. By default, Tomcat is configured with two Connectors, which are HTTP Connector and AJP Connector: HTTP Connector: used to process HTTP protocol requests (HTTP/1.1), and the default listening address is 0.0.0.0:8080, AJP Connector: used to process AJP protocol requests (AJP/1.3), and the default listening address is 0.0.0.0:8009. Here’s how to find and mitigate it. In order to prevent unauthorized access, simply disable the AJP endpoint. It also allows the attacker to process any file in the web application as JSP. Learn more about Black Duck software composition analysis. Dubbed Ghostcat and tracked as CVE-2020-1938, the flaw was discovered by researchers at Chinese cybersecurity firm Chaitin Tech, who reported their findings to the Apache Software Foundation on January 3. Ghostcat also affects the default configuration of Tomcat, and many servers may be vulnerable to attacks directly from the internet. The flaw resides in the Tomcat AJP connector which is the channel used by Tomcat to receives the request from outside. However, the attacker must be able to save the uploaded files to the document root and to reach the AJP port directly from outside the target’s network. Solve your open source needs with OpenLogic support. Ghostcat logo created by Chaitin Tech The vulnerability, dubbed Ghostcat, was discovered by researchers at Chaitin Tech and reported to the Apache Software Foundation on January 3, 2020. Andrew has been working in the IT industry since 1996, ranging from hardware and networking to application development. GhostCat isn't the only open source vulnerability you need to worry about. This vulnerability is present in all versions of Apache Tomcat released in the last 13 years (versions 6.x/7.x/8.x/9.x).

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