CVE-2016-3021 in Security Access Manager For Web
Summary
by MITRE
IBM Security Access Manager for Web could allow an authenticated attacker to obtain sensitive information from error message using a specially crafted HTTP request.
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Analysis
by VulDB Data Team • 11/11/2022
IBM Security Access Manager for Web contains a vulnerability that enables authenticated attackers to extract sensitive information through carefully constructed HTTP requests that trigger error messages. This flaw stems from insufficient input validation and error handling mechanisms within the web application framework. When an authenticated user submits a malformed request, the system generates detailed error responses that inadvertently expose internal system information including file paths, stack traces, and potentially database connection details. The vulnerability specifically affects the web application's response to malformed input during authentication and authorization processes, where error messages are not properly sanitized before being returned to the client. The authenticated nature of this attack means that an adversary must first establish valid credentials to exploit the vulnerability, though this initial requirement does not diminish the potential impact. According to the CWE database, this represents a weakness classified as CWE-20: Improper Input Validation, which occurs when a product does not validate or incorrectly validates input data. The vulnerability aligns with ATT&CK technique T1212: Exploitation for Credential Access, as attackers can leverage information disclosure to gain additional system insights that may aid in further exploitation attempts. The security implications extend beyond simple information disclosure, as the leaked details could enable attackers to craft more sophisticated attacks against the same system or identify other potential vulnerabilities within the broader infrastructure.
The technical exploitation of this vulnerability requires an authenticated session and involves sending specifically crafted HTTP requests that cause the application to generate error responses containing sensitive data. Attackers can manipulate parameters within the request to trigger different error conditions, with the system's response revealing internal implementation details that should remain hidden from external users. The error messages typically include technical artifacts such as Java stack traces, database query information, or system configuration details that provide attackers with valuable reconnaissance data. This information leakage occurs because the application framework does not implement proper error handling procedures that would mask sensitive details from user-facing responses. The vulnerability exists in the web application's security processing layer where authentication requests are validated and processed, making it particularly dangerous as it can be exploited during legitimate user interactions. The error handling mechanism fails to distinguish between legitimate system errors that require debugging information and those that should remain opaque to users, creating a window of opportunity for attackers to gather intelligence about the underlying system architecture.
The operational impact of this vulnerability extends beyond immediate information disclosure, as the leaked data can facilitate more advanced attack vectors and compromise the overall security posture of the affected system. An attacker who successfully exploits this vulnerability can use the collected information to plan subsequent attacks, potentially leading to privilege escalation or lateral movement within the network. The exposure of internal system details such as file paths and database structures significantly reduces the attack surface complexity for malicious actors who may then target other components of the infrastructure. Organizations using IBM Security Access Manager for Web may experience increased risk of credential theft, unauthorized access attempts, and potential data breaches if this vulnerability remains unpatched. The vulnerability also affects the system's ability to maintain proper security boundaries, as it undermines the principle of least privilege by exposing internal implementation details that should remain confidential. Security monitoring systems may not immediately detect this vulnerability due to the legitimate nature of the requests, making it difficult to identify exploitation attempts through conventional detection methods. The impact is particularly concerning in environments where the application serves as a critical access control point, as compromised information could enable attackers to bypass security controls and gain unauthorized access to protected resources.
Organizations should implement immediate mitigations including applying the relevant security patches provided by IBM, which address the root cause by improving input validation and error handling mechanisms. System administrators should configure the application to suppress detailed error messages in production environments, ensuring that only generic error responses are returned to users while maintaining detailed logging for administrative purposes. Network segmentation and access controls should be strengthened to limit the potential impact of successful exploitation attempts, particularly by restricting access to the vulnerable application to authorized users only. Security monitoring solutions should be enhanced to detect unusual patterns in error message generation that may indicate exploitation attempts, and regular security assessments should be conducted to identify similar vulnerabilities in related systems. The implementation of proper input sanitization and output encoding practices should be enforced across all web applications to prevent similar issues from occurring. Additionally, organizations should review their incident response procedures to ensure they can effectively respond to information disclosure events and conduct regular staff training on recognizing and mitigating such vulnerabilities. Compliance with security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity frameworks should be maintained to ensure comprehensive protection against this and similar threats.