CVE-2007-5578 in Basic Analysis
Summary
by MITRE
Basic Analysis and Security Engine (BASE) before 1.3.8 sends a redirect to the web browser but does not exit, which allows remote attackers to bypass authentication via (1) base_main.php, (2) base_qry_alert.php, and possibly other vectors.
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Analysis
by VulDB Data Team • 03/16/2015
The vulnerability identified in CVE-2007-5578 affects the Basic Analysis and Security Engine (BASE) version 1.3.7 and earlier, representing a critical authentication bypass flaw that undermines the security posture of network security monitoring systems. This vulnerability resides in the web application's handling of HTTP redirects within the base_main.php and base_qry_alert.php scripts, creating a pathway for unauthenticated attackers to gain access to protected administrative functions. The flaw stems from the application's improper termination of execution flow following redirect operations, leaving the application in a state where subsequent requests can be processed without proper authentication verification. This behavior violates fundamental security principles of access control and authentication enforcement that are essential for protecting sensitive security information and administrative interfaces.
The technical implementation of this vulnerability demonstrates a classic flaw in web application security where the redirect mechanism fails to properly terminate the current execution context. When an authentication check fails or when the application attempts to redirect to an authentication page, the code continues execution instead of properly exiting the current request handler. This allows attackers to manipulate the application flow by directly accessing protected endpoints through crafted requests that bypass the initial authentication checks. The vulnerability affects multiple entry points within the BASE application, with base_main.php and base_qry_alert.php being specifically mentioned, indicating a systemic issue rather than an isolated flaw. This type of vulnerability aligns with CWE-285, which addresses improper authorization in software systems, and represents a failure in implementing proper access control mechanisms. The flaw essentially creates a window of opportunity where the application's authentication state is not properly enforced, allowing unauthorized access to administrative functions and potentially sensitive security event data.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential data breaches and system compromise within network security monitoring environments. Attackers exploiting this vulnerability could gain access to security event logs, alert configurations, and administrative controls that would normally be protected from unauthorized users. This poses significant risks to organizations relying on BASE for intrusion detection and security monitoring, as the compromise of the application could lead to unauthorized modification of security policies, deletion of critical log data, or complete takeover of the security monitoring infrastructure. The vulnerability affects organizations that deploy BASE for security information and event management (SIEM) functions, potentially exposing them to insider threats or external attackers who can manipulate security alerts and monitoring configurations. From an attacker's perspective, this represents a low-effort, high-impact exploit that could be automated and leveraged for further reconnaissance or lateral movement within compromised networks.
Mitigation strategies for CVE-2007-5578 require immediate patching of the affected BASE application to version 1.3.8 or later, which contains the necessary code fixes to properly terminate execution contexts following redirect operations. Organizations should implement network segmentation and access controls to limit exposure of the BASE application to untrusted networks, while also ensuring that authentication mechanisms are properly enforced through additional layers of security. The vulnerability highlights the importance of proper input validation and execution flow control in web applications, particularly those handling security-sensitive data. Security teams should conduct comprehensive audits of their security monitoring tools to identify similar authentication bypass vulnerabilities, as this flaw demonstrates how seemingly minor code execution issues can lead to significant security compromises. Additionally, implementing network monitoring to detect unusual access patterns or unauthorized attempts to access administrative functions can help identify exploitation attempts. This vulnerability serves as a reminder of the critical importance of proper application security testing, particularly in security tools where the compromise of the monitoring system itself can lead to complete loss of security visibility for the organization. Organizations should also consider implementing additional authentication layers such as two-factor authentication or API key management to provide defense in depth against similar vulnerabilities. The incident underscores the necessity of maintaining up-to-date security software and following secure coding practices that prevent execution flow manipulation and ensure proper authentication state management throughout the application lifecycle.