Azure Arc-enabled data services us Elasticsearch version 7. However, your applications may use Log4J and be susceptible to these vulnerabilities. If you are not able to re-package your application with a newer version of Log4j and you are using Log4j versions 2. Note that this command will also restart your App Service hosted application.
In our investigation so far, we have not found any evidence that these services are vulnerable however customer applications running behind these services might be vulnerable to this exploit.
We highly recommend customers to follow mitigations and workarounds mentioned in this blog to protect their applications. Additional guidance for Azure WAF is located here. Your instance may be vulnerable if you have installed an affected version of Log4j or have installed services that transitively depend on an affected version. For more information on checking for vulnerable Log4j 2 instances installed, please see the following Microsoft Document: Verify the version of Log4j on your cluster.
Customers are recommended to apply the latest Log4j security updates and re-deploy applications. If you are not able to and you are using Log4j versions 2. Note that these application settings will restart your Function apps, and it will no longer use warm workers which will impact future cold-start performance.
All Azure HDInsight 5. Any HDI 4. For new clusters created using HDI 4. Jobs should only be executed after the patch has been applied and the impacted nodes have been rebooted to ensure that the vulnerability has been fixed. The patch should be run on each new cluster as a persisted script action until a new HDInsight image is available that incorporates the patch.
Applications deployed to Azure Spring Cloud may use Log4j and be susceptible to this vulnerability. Log4j usage may originate from:. Spring Boot applications are only affected if they have switched the default logging framework to Log4j 2. The log4j-to-slf4j and log4j-api jar files that are included in spring-boot-starter-logging cannot be exploited on their own. Only applications using log4j-core are vulnerable. If your application is impacted and you can redeploy the application, we recommend that you upgrade your application with the latest security updates for Log4j, and redeploy to Azure Spring Cloud — see more details at Log4j 2 vulnerability and Spring Boot.
If you are not able to re-deploy, you may mitigate impacted applications that are using Log4j 2. You can set the system property or environment variable using:. In the Azure Portal, navigate to your application in Azure Spring Cloud and change the configuration as illustrated below:. You can set the log4j2. Applications monitored by Application Insights or Dynatrace Java Agents do not carry any potential risk associated with the Log4j vulnerability.
If you activated New Relic or AppDynamics Agents for your applications, we recommend that you restart your applications. Azure Spring Cloud will take steps to automatically protect customers and auto-restart any application with activated New Relic or AppDynamics Java Agents by Tuesday, December 21 st , to ensure the latest fixes take effect.
Cosmos DB SDKs do not have dependency on Log4j 2 and allow customers to independently bring their own logging technologies. If customers independently decide to use Log4j 2 they should ensure to use Log4j 2.
Cosmos DB Spark Connector utilizes underlying spark offering logging technologies. While the industry is determining and mitigating overall exposure, attackers are probing all endpoints for vulnerabilities. Applying rigorous least privilege access policies to all resources in your environment is critical. If you use Azure Active Directory for single-sign on in your environment, we recommend you do the following with a special focus on applications you deploy or manage directly SaaS apps, including those deployed by Microsoft, must be secured by their vendors.
Note that log4j2 usage may be pre-auth for some of your applications, but these steps will help prevent post-authentication exploitation. Templates and examples for these policies are built in to facilitate deployment:.
Minecraft customers running their own servers are encouraged to deploy the latest Minecraft server update to protect their users. Note : If an application in the VM uses Log4j, it may be susceptible to this vulnerability. Please follow mitigation guidance published here. Microsoft security teams have put together the following guidance and resources to help customers understand these vulnerabilities and to help detect and hunt for exploits:. Added guidance for Java 7. Added guidance on Azure libraries for Java.
Skip to content Published on: Dec 11, updated Dec Java 8 or newer: update Log4j to 2. Apache Announcement: Log4j 1. These workarounds should not be considered a complete solution to resolve these vulnerabilities: For all releases of Log4j 2. Customers can do this by deleting the class from affected JAR files. In case the Log4j 2 vulnerable component cannot be updated, Log4j versions 2. Alternatively, customers using Log4j 2. An application restart will be required for these changes to take effect.
Analysis of the vulnerabilities The vulnerabilities allow remote code execution by an unauthenticated attacker to gain complete access to a target system. CVE and CE exploit vectors and attack chain Mitigation Guidance for Microsoft Services After further analysis of our services and products, below are a few mitigation strategies given by various Microsoft services.
Azure Application Gateway, Azure Front Door, and Azure WAF In our investigation so far, we have not found any evidence that these services are vulnerable however customer applications running behind these services might be vulnerable to this exploit. Azure Databricks Your instance may be vulnerable if you have installed an affected version of Log4j or have installed services that transitively depend on an affected version.
If this works, and you have followed the steps above, Apache should execute as a service with no problems. When starting Apache as a service you may encounter an error message from the Windows Service Control Manager.
For example, if you try to start Apache by using the Services applet in the Windows Control Panel, you may get the following message:. Could not start the Apache2. You will get this generic error if there is any problem with starting the Apache service. In order to see what is really causing the problem you should follow the instructions for Running Apache for Windows from the Command Prompt. If you are having problems with the service, it is suggested you follow the instructions below to try starting httpd.
Running Apache as a service is usually the recommended way to use it, but it is sometimes easier to work from the command line, especially during initial configuration and testing. This will open a console window and start Apache inside it.
If you don't have Apache installed as a service, the window will remain visible until you stop Apache by pressing Control-C in the console window where Apache is running in. The server will exit in a few seconds. However, if you do have Apache installed as a service, the shortcut starts the service.
If the Apache service is running already, the shortcut doesn't do anything. If Apache is running as a service, you can tell it to stop by opening another console window and entering:.
Running as a service should be preferred over running in a console window because this lets Apache end any current operations and clean up gracefully. But if the server is running in a console window, you can only stop it by pressing Control-C in the same window. You can also tell Apache to restart. This forces it to reread the configuration file. Any operations in progress are allowed to complete without interruption.
To restart Apache, either press Control-Break in the console window you used for starting Apache, or enter.
Change to the folder to which you installed Apache, type the command httpd. Then change to the logs folder, and review the error. When working with Apache it is important to know how it will find the configuration file.
You can specify a configuration file on the command line in two ways:. In both of these cases, the proper ServerRoot should be set in the configuration file. This built-in path is relative to the installation directory. Apache will then try to determine its ServerRoot by trying the following, in this order:.
If you did not do a binary install, Apache will in some scenarios complain about the missing registry key. This warning can be ignored if the server was otherwise able to find its configuration file. The value of this key is the ServerRoot directory which contains the conf subdirectory. When Apache starts it reads the httpd. If this file contains a ServerRoot directive which contains a different directory from the one obtained from the registry key above, Apache will forget the registry key and use the directory from the configuration file.
If you copy the Apache directory or configuration files to a new location it is vital that you update the ServerRoot directive in the httpd. After starting Apache either in a console window or as a service it will be listening on port 80 unless you changed the Listen directive in the configuration files or installed Apache only for the current user.
To connect to the server and access the default page, launch a browser and enter this URL:. Apache should respond with a welcome page and you should see "It Works! If nothing happens or you get an error, look in the error. If you happen to be running Apache on an alternate port, you need to explicitly put that in the URL:.
Once your basic installation is working, you should configure it properly by editing the files in the conf subdirectory. Again, if you change the configuration of the Windows NT service for Apache, first attempt to start it from the command line to make sure that the service starts with no errors.
These conflicting services include other WWW servers, some firewall implementations, and even some client applications such as Skype which will use port 80 to attempt to bypass firewall issues. Mapped drive letters allow the administrator to maintain the mapping to a specific machine and path outside of the Apache httpd configuration.
However, these mappings are associated only with interactive sessions and are not directly available to Apache httpd when it is started as a service. Use only UNC paths for network resources in httpd. Arcane and error prone procedures may work around the restriction on mapped drive letters, but this is not recommended.
When running Apache httpd as a service, you must create a separate account in order to access network resources, as described above. If more than a few dozen piped loggers are used on an operating system instance, scaling up the "desktop heap" is often necessary. For more detailed information, refer to the piped logging documentation.
Copyright The Apache Software Foundation. Licensed under the Apache License, Version 2. Customizing Apache for Windows Apache is configured by the files in the conf subdirectory. The main differences in Apache for Windows are: Because Apache for Windows is multithreaded, it does not use a separate process for each request, as Apache can on Unix.
The process management directives are also different: MaxConnectionsPerChild : Like the Unix directive, this controls how many connections a single child process will serve before exiting. Warning: The server configuration file is reread when a new child process is started. If you have modified httpd. You can install Apache as a Windows NT service as follows from the command prompt at the Apache bin subdirectory: httpd.
Never grant any network privileges to the LocalSystem account! If you need Apache to be able to access network resources, create a separate account for Apache as noted below. It is usually a good practice to grant the user the Apache service runs as read and execute RX access to the whole Apache2. Error code is a good indication that you need to review the "Log On As" configuration for the service, since Apache cannot access a required network resource.
Also, pay close attention to the privileges of the user Apache is configured to run as.
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