CVE-2009-0027 in JBoss Enterprise Application Platform
Summary
by MITRE
The request handler in JBossWS in JBoss Enterprise Application Platform (aka JBoss EAP or JBEAP) 4.2 before 4.2.0.CP06 and 4.3 before 4.3.0.CP04 does not properly validate the resource path during a request for a WSDL file with a custom web-service endpoint, which allows remote attackers to read arbitrary XML files via a crafted request.
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Analysis
by VulDB Data Team • 08/04/2021
The vulnerability identified as CVE-2009-0027 represents a critical path traversal flaw within the JBossWS component of JBoss Enterprise Application Platform versions 4.2 before 4.2.0.CP06 and 4.3 before 4.3.0.CP04. This security weakness resides in the request handler's insufficient validation mechanisms for resource paths when processing WSDL file requests with custom web-service endpoints. The flaw operates by allowing malicious actors to manipulate the request parameters to navigate beyond the intended directory boundaries and access arbitrary XML files stored on the server filesystem.
The technical exploitation of this vulnerability stems from inadequate input sanitization and path validation within the web service request processing pipeline. When a client makes a request for a WSDL file through a custom endpoint, the system fails to properly validate the resource path parameter, enabling attackers to inject malicious path traversal sequences such as "../" or similar constructs. This validation failure creates an opportunity for unauthorized file access, allowing remote threat actors to retrieve sensitive XML configuration files, deployment descriptors, or other potentially sensitive data that should remain protected within the application's secure boundaries. The vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as the ability to read arbitrary XML files can lead to comprehensive system reconnaissance and potentially facilitate further exploitation. Attackers can leverage this flaw to obtain sensitive configuration files that may contain database connection strings, encryption keys, or other critical system parameters. The vulnerability affects the core web service functionality of JBoss EAP, potentially compromising the integrity and confidentiality of web services deployed within the platform. This weakness particularly impacts enterprise environments where JBoss EAP is used for mission-critical applications, as it provides a direct pathway for attackers to gather intelligence about the underlying system architecture and potentially identify additional attack vectors.
Organizations utilizing affected JBoss EAP versions should prioritize immediate patching to address this vulnerability, as the remediation involves updating to the patched versions 4.2.0.CP06 and 4.3.0.CP04 respectively. Security administrators should also implement network-level mitigations such as web application firewalls that can detect and block suspicious path traversal patterns in HTTP requests. Additionally, the principle of least privilege should be enforced by restricting access to WSDL endpoints and implementing proper input validation at multiple layers of the application architecture. From an ATT&CK framework perspective, this vulnerability maps to techniques involving path traversal and credential access, potentially enabling adversaries to move laterally within the network infrastructure. The vulnerability demonstrates the critical importance of proper input validation in web service implementations and highlights the need for comprehensive security testing of enterprise application platforms.