CVE-2015-4997 in WebSphere Portal
Summary
by MITRE
IBM WebSphere Portal 8.5.0 before CF08 allows remote attackers to bypass intended access restrictions via a crafted request.
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Analysis
by VulDB Data Team • 06/25/2022
IBM WebSphere Portal 8.5.0 before CF08 contains a critical access control vulnerability that enables remote attackers to bypass intended security restrictions through carefully crafted requests. This vulnerability resides in the portal's authorization mechanisms and represents a significant weakness in the product's security architecture. The flaw allows malicious actors to access restricted resources and functionality without proper authentication or authorization, potentially leading to unauthorized data access, privilege escalation, and system compromise. The vulnerability affects the portal's ability to properly validate user permissions and session tokens during request processing, creating an exploitable path for attackers to circumvent access controls that should protect sensitive portal features and content.
The technical implementation of this vulnerability stems from insufficient input validation and authorization checking within the WebSphere Portal's request handling pipeline. Attackers can construct specific HTTP requests that manipulate authentication tokens, session identifiers, or access control parameters to gain access to protected portal resources. This weakness aligns with CWE-285, which addresses improper authorization issues in software systems. The vulnerability demonstrates a failure in the portal's security model where the system does not adequately verify user privileges before granting access to restricted functionality. The attack vector is particularly dangerous because it operates over network protocols and can be executed remotely without requiring physical access to the system or prior authentication credentials.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential data breaches, system integrity compromise, and business disruption. Organizations relying on WebSphere Portal for enterprise content management, user authentication, or sensitive data processing face significant risk exposure when this vulnerability exists in their environment. The vulnerability can enable attackers to access confidential business information, modify portal configurations, impersonate legitimate users, and potentially escalate privileges to administrative levels. Security teams must consider the broader implications for their organization's attack surface, as this vulnerability could serve as a stepping stone for more sophisticated attacks. The impact is particularly severe in environments where the portal serves as a central hub for enterprise applications and user management systems.
Mitigation strategies for this vulnerability require immediate action including applying the relevant IBM fix pack or cumulative fix that addresses the access control bypass issue. Organizations should also implement network segmentation to limit access to portal resources, deploy intrusion detection systems to monitor for suspicious request patterns, and conduct thorough security assessments of their portal configurations. The fix addresses the underlying authorization flaw by strengthening the validation of access control parameters and ensuring proper session management throughout the portal's request processing lifecycle. Security administrators should also consider implementing additional controls such as web application firewalls, enhanced logging and monitoring, and regular security audits to detect and prevent exploitation attempts. Organizations may also need to review their existing access control policies and ensure proper role-based access controls are implemented to minimize the potential impact should the vulnerability be exploited. This remediation effort aligns with the ATT&CK framework's privilege escalation techniques and demonstrates the importance of maintaining up-to-date security patches in enterprise environments.