CVE-2011-1484 in JBoss Enterprise Application Platform
Summary
by MITRE
jboss-seam.jar in the JBoss Seam 2 framework 2.2.x and earlier, as distributed in Red Hat JBoss Enterprise SOA Platform 4.3.0.CP04 and 5.1.0 and JBoss Enterprise Application Platform (aka JBoss EAP or JBEAP) 4.3.0.CP09 and 5.1.0, does not properly restrict use of Expression Language (EL) statements in FacesMessages during page exception handling, which allows remote attackers to execute arbitrary Java code via a crafted URL to an application.
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Analysis
by VulDB Data Team • 11/15/2021
The vulnerability identified as CVE-2011-1484 represents a critical remote code execution flaw within the JBoss Seam 2 framework that affects versions 2.2.x and earlier. This issue specifically manifests in the jboss-seam.jar component where the framework fails to properly sanitize Expression Language (EL) statements when processing FacesMessages during page exception handling scenarios. The vulnerability stems from insufficient input validation and sanitization mechanisms that allow malicious users to inject arbitrary Java code through carefully crafted URLs. The affected platforms include Red Hat JBoss Enterprise SOA Platform versions 4.3.0.CP04 and 5.1.0, as well as JBoss Enterprise Application Platform versions 4.3.0.CP09 and 5.1.0, making this a widespread concern across enterprise Java application deployments.
The technical flaw exploits the framework's handling of exception messages and error page rendering processes where FacesMessages are constructed and displayed to users. When an application encounters an exception during page processing, the Seam framework typically generates error messages that are rendered in the user interface. However, the vulnerability occurs because the framework does not adequately filter or escape EL expressions contained within these messages before they are processed by the JSF (JavaServer Faces) runtime. This allows attackers to inject malicious EL expressions that get evaluated during the rendering phase, effectively enabling arbitrary code execution on the server. The vulnerability is particularly dangerous because it requires no authentication or authorization to exploit, making it a severe remote code execution threat.
The operational impact of this vulnerability is extensive and potentially devastating for organizations relying on affected JBoss Seam applications. Attackers can leverage this vulnerability to execute arbitrary Java code with the privileges of the application server process, which typically runs with elevated permissions. This could lead to complete system compromise, data exfiltration, privilege escalation, and the ability to establish persistent backdoors within the enterprise network. The vulnerability affects any web application built on the JBoss Seam framework that processes user input through exception handling mechanisms, making it particularly dangerous in applications that handle user-submitted data or external inputs. Organizations may experience significant business disruption, regulatory compliance violations, and potential financial losses due to data breaches and system compromises.
Mitigation strategies for CVE-2011-1484 should prioritize immediate patching of affected systems with the latest security updates provided by Red Hat and JBoss. Organizations should also implement network-level controls including firewall rules that restrict access to vulnerable applications and implement web application firewalls to monitor and filter malicious requests. Application-level defenses include configuring proper input validation and sanitization for all user inputs, implementing strict EL expression restrictions, and disabling unnecessary EL evaluation in error handling scenarios. Security teams should conduct comprehensive vulnerability assessments to identify all affected applications and ensure proper configuration of the Seam framework's exception handling mechanisms. The vulnerability aligns with CWE-94, which describes improper control of generation of code, and maps to ATT&CK technique T1059.007 for execution through Java, emphasizing the need for layered security approaches that address both application-level and infrastructure-level protections. Regular security monitoring and incident response procedures should be implemented to detect potential exploitation attempts and maintain overall system security posture.