CVE-2018-1154 in SecurityCenter
Summary
by MITRE
In SecurityCenter versions prior to 5.7.0, a username enumeration issue could allow an unauthenticated attacker to automate the discovery of username aliases via brute force, ultimately facilitating unauthorized access. Server response output has been unified to correct this issue.
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Analysis
by VulDB Data Team • 03/15/2020
The vulnerability identified as CVE-2018-1154 represents a critical username enumeration flaw within SecurityCenter software versions prior to 5.7.0, creating a significant security risk for organizations relying on this platform for network security monitoring. This issue stems from the application's inconsistent response behavior when processing authentication requests, where the system provides different error messages or response times depending on whether a username exists in the system. Attackers can exploit this inconsistency to systematically determine valid usernames through automated brute force techniques, effectively bypassing traditional authentication controls and gaining unauthorized access to privileged resources.
The technical nature of this vulnerability aligns with CWE-203, which specifically addresses the exposure of sensitive information through inconsistent error messages that reveal system state information. The flaw operates at the application layer where the authentication service fails to provide uniform responses to all authentication attempts, creating observable differences that adversaries can leverage. This type of vulnerability falls under the broader category of information disclosure issues and represents a fundamental weakness in the security design of the authentication mechanism.
From an operational impact perspective, this vulnerability enables attackers to conduct systematic username enumeration attacks without requiring any prior knowledge of valid accounts within the system. The attacker can automate the process of discovering valid usernames by observing response patterns, which can then be used as a stepping stone for more sophisticated attacks including password spraying, credential stuffing, or direct brute force attempts against discovered accounts. The unified server response implementation that addresses this issue demonstrates the importance of maintaining consistent error handling practices in security-critical applications to prevent information leakage that could aid malicious actors in their attack planning.
The mitigation strategy for CVE-2018-1154 requires organizations to implement consistent error handling across all authentication endpoints, ensuring that all authentication attempts return identical responses regardless of whether the username exists in the system. This approach aligns with the principle of least information disclosure and follows security best practices recommended by frameworks such as the OWASP Top Ten and NIST Cybersecurity Framework. Organizations should also implement account lockout mechanisms, rate limiting, and multi-factor authentication to add additional layers of protection against automated attack vectors. The fix implemented in SecurityCenter version 5.7.0 demonstrates how addressing such vulnerabilities requires careful attention to response consistency and proper error handling design patterns that prevent adversaries from gaining intelligence about system internals through indirect means.