![]() From 8.5.x onwards this header is not set by default. The Apache Tomcat team confirm that all above mentioned tomcat version are vulnerable for dangerous remote code execution (RCE) vulnerability on all operating system if default servlet or WebDAV servlet is enabled with the parameter readonly set to. The default value of this header for Tomcat 4.1.x to 8.0.x is Apache-Coyote/1.1. It is likely that users upgrading to 9.0.31, 8.5.51 or 7.0.100 or later will need to make small changes to their configurations. Once file uploaded, the code it contains could be executed by requesting the file. Go to tomcat/conf folder Modify server. Let’s hide the product and version details from the Server header. By default, a page served by Tomcat will show like this. A number of changes were made to the default AJP Connector configuration in 9.0.31 to harden the default configuration. Having a server banner expose the product and version you are using and leads to information leakage vulnerability. Users wishing to take a defence-in-depth approach and block the vector that permits returning arbitrary files and execution as JSP may upgrade to Apache Tomcat 9.0.31, 8.5.51 or 7.0.100 or later. The name of the cluster the application is deployed in. It is required the to remove default web applications / files for Apache Tomcat which is bundled with SAP BusinessObjects Business Intelligence (BI). Log4j Kubernetes provides access to the following container attributes: accountName. It is important to note that mitigation is only required if an AJP port is accessible to untrusted users. The KubernetesLookup can be used to lookup attributes from the Kubernetes environment for the container the application is running in. This vulnerability report identified a mechanism that allowed: - returning arbitrary files from anywhere in the web application - processing any file in the web application as a JSP Further, if the web application allowed file upload and stored those files within the web application (or the attacker was able to control the content of the web application by some other means) then this, along with the ability to process a file as a JSP, made remote code execution possible. It was expected (and recommended in the security guide) that this Connector would be disabled if not required. In Apache Tomcat 9.0.0.M1 to 9.0.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99, Tomcat shipped with an AJP Connector enabled by default that listened on all configured IP addresses. If such connections are available to an attacker, they can be exploited in ways that may be surprising. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP connection. When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat.
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