CVE-2018-1553 in WebSphere Application Server
Summary
by MITRE
IBM WebSphere Application Server Liberty prior to 18.0.0.2 could allow a remote attacker to obtain sensitive information, caused by mishandling of exceptions by the SAML Web SSO feature. IBM X-Force ID: 142890.
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Analysis
by VulDB Data Team • 03/29/2023
The vulnerability identified as CVE-2018-1553 affects IBM WebSphere Application Server Liberty versions prior to 18.0.0.2, presenting a significant security risk through improper exception handling within the SAML Web Single Sign-On feature. This flaw enables remote attackers to potentially obtain sensitive information that could compromise system integrity and user authentication processes. The issue stems from the application's failure to properly manage error conditions during SAML authentication workflows, creating opportunities for information disclosure that could be exploited by malicious actors without requiring authentication credentials.
The technical implementation of this vulnerability resides in how the SAML Web SSO feature processes authentication failures and exception scenarios. When authentication requests encounter issues, the system's exception handling mechanism inadvertently exposes internal system details, error messages, or configuration information that should remain confidential. This misconfiguration allows attackers to gather intelligence about the underlying system architecture, authentication mechanisms, and potentially sensitive data structures. The vulnerability operates at the application layer and can be exploited through network-based attacks targeting the SAML endpoints, making it particularly dangerous in environments where SAML authentication is actively utilized for enterprise single sign-on operations.
The operational impact of CVE-2018-1553 extends beyond simple information disclosure, as the exposed data could facilitate more sophisticated attacks including credential harvesting, system reconnaissance, and potential privilege escalation attempts. Attackers leveraging this vulnerability could gain insights into authentication protocols, system configurations, and potentially identify other weaknesses within the WebSphere environment. The exposure of internal system details through improper exception handling creates a foundation for advanced persistent threats and increases the attack surface for subsequent exploitation attempts. Organizations relying on SAML-based authentication for critical applications face heightened risk of unauthorized access and data breaches.
Mitigation strategies for this vulnerability primarily focus on upgrading to IBM WebSphere Application Server Liberty version 18.0.0.2 or later, which contains the necessary patches to address the improper exception handling in the SAML Web SSO feature. System administrators should also implement network segmentation and access controls to limit exposure of SAML endpoints to trusted networks only. Additional protective measures include monitoring for unusual authentication patterns, implementing robust logging mechanisms to detect exploitation attempts, and conducting regular security assessments of authentication infrastructure. Organizations should also review their SAML configuration settings to ensure that error messages and system responses do not inadvertently reveal sensitive information about internal system components. This vulnerability aligns with CWE-200, which addresses improper handling of exceptions leading to information disclosure, and could be categorized under ATT&CK technique T1212 for exploitation of information disclosure vulnerabilities in authentication systems.