CVE-2011-2088 in WebWork
Summary
by MITRE
XWork 2.2.1 in Apache Struts 2.2.1, and OpenSymphony XWork in OpenSymphony WebWork, allows remote attackers to obtain potentially sensitive information about internal Java class paths via vectors involving an s:submit element and a nonexistent method, a different vulnerability than CVE-2011-1772.3.
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Analysis
by VulDB Data Team • 01/12/2025
The vulnerability identified as CVE-2011-2088 represents a sensitive information disclosure issue affecting Apache Struts 2.2.1 and OpenSymphony XWork components. This flaw manifests through the improper handling of s:submit elements when processing requests that reference nonexistent methods within the application's action classes. The vulnerability specifically exploits how the framework responds to malformed method references during the action execution process, leading to the exposure of internal system information that should remain confidential.
The technical implementation of this vulnerability occurs within the XWork framework's method resolution mechanism where the system attempts to locate and execute methods specified in action configurations. When a request targets a method that does not exist, the framework's error handling routine inadvertently reveals internal Java class paths and system configuration details through exception messages or error responses. This occurs because the framework's default error reporting mechanism includes stack traces or class path information that provides attackers with insights into the application's internal structure and deployment environment.
The operational impact of CVE-2011-2088 extends beyond simple information disclosure as it provides adversaries with critical reconnaissance data that can be leveraged for subsequent attacks. The leaked class path information can reveal the exact versions of libraries being used, the structure of the application's package hierarchy, and potentially sensitive deployment details that would otherwise remain hidden. This information significantly reduces the attack surface by providing attackers with precise targeting capabilities for exploiting other vulnerabilities within the same system. The vulnerability aligns with CWE-200, which specifically addresses information exposure, and represents a classic example of how improper error handling can create security risks.
Security professionals should consider this vulnerability in the context of the broader ATT&CK framework, particularly under the reconnaissance and initial access phases where attackers gather system information. The exposure of internal class paths can facilitate more sophisticated attacks such as deserialization exploits or privilege escalation attempts that rely on knowing the exact framework components and their versions. Organizations should implement comprehensive input validation and error handling mechanisms that prevent the leakage of internal system information through error responses. The recommended mitigations include configuring the application to suppress detailed error messages, implementing proper exception handling that does not expose system internals, and upgrading to patched versions of Apache Struts and XWork components. Additionally, network segmentation and web application firewalls can help limit the impact of such information disclosure vulnerabilities by restricting access to potentially sensitive error responses.
This vulnerability demonstrates the critical importance of secure error handling practices in web applications and highlights how seemingly benign framework behaviors can create significant security risks. The flaw underscores the need for comprehensive security testing that includes examining error response handling and input validation mechanisms. Organizations should conduct regular security assessments to identify similar information disclosure vulnerabilities and ensure that all application components follow secure coding practices that prevent the exposure of internal system details through error messages or exception handling routines.