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CVE-2011-3923 is a remote command execution vulnerability in Apache Struts 2 before 2.3.1.2. The flaw is in the ParametersInterceptor class, where crafted parameter names containing malicious OGNL expressions can bypass intended security protections. By abusing this weakness, a remote attacker can cause attacker-controlled OGNL to be evaluated and execute arbitrary commands on the underlying server. The issue affects Struts 2 applications using the vulnerable interceptor behavior prior to the fixed release.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/multi/http/struts_code_exec_parameters.rb) that exploits a remote code execution vulnerability (CVE-2011-3923) in Apache Struts versions prior to 2.3.1.2. The vulnerability arises from the ParametersInterceptor's handling of OGNL expressions, allowing attackers to inject and execute arbitrary Java code via crafted HTTP GET parameters. The module supports exploitation of Windows, Linux, and generic Java targets by uploading and executing a payload (executable or JAR) on the server. The attacker can specify the target URI, parameter name, and other options. The exploit is weaponized, as it is part of the Metasploit framework and supports customizable payloads. The main attack vector is network-based, targeting HTTP endpoints exposed by vulnerable Struts applications. Notable endpoints include the default action path '/blank-struts2/login.action' and the '/tmp/' directory for payload storage on Linux systems.
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