CVE-2012-0236 in WebAccess
Summary
by MITRE
Advantech/BroadWin WebAccess 7.0 and earlier allows remote attackers to obtain sensitive information via a direct request to a URL. NOTE: the vendor reportedly "does not consider it to be a security risk."
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Analysis
by VulDB Data Team • 04/10/2017
The vulnerability identified as CVE-2012-0236 affects Advantech/BroadWin WebAccess versions 7.0 and earlier, representing a sensitive information disclosure issue that can be exploited remotely through direct URL requests. This flaw resides within industrial automation and building management systems that are commonly deployed in critical infrastructure environments where security is paramount. The vulnerability stems from inadequate access controls and improper authorization mechanisms within the web interface, allowing unauthenticated users to access restricted system information through straightforward web requests. Such exposure creates a significant risk for organizations relying on these systems for operational technology infrastructure management.
The technical implementation of this vulnerability involves the web application failing to properly validate user credentials or session tokens before serving sensitive data through direct URL access patterns. Attackers can exploit this weakness by constructing specific HTTP requests that bypass normal authentication procedures, potentially gaining access to configuration files, system logs, user credentials, or other confidential operational data. This type of information disclosure vulnerability aligns with CWE-200, which categorizes improper information exposure as a fundamental security flaw that can lead to cascading attacks. The flaw represents a classic case of insufficient authorization checks where the application assumes all requests are legitimate without proper verification of user privileges or authentication status.
From an operational impact perspective, this vulnerability poses serious risks to industrial control systems and building automation environments where Advantech WebAccess is deployed. The sensitive information that can be obtained through this attack vector may include system configuration details, network topology information, user account data, and potentially credentials that could enable further exploitation. Organizations using these systems face potential exposure of operational technology infrastructure details that could be leveraged by attackers to plan more sophisticated attacks against their industrial control systems. The vulnerability's remote exploitation capability means that attackers do not need physical access or network proximity to the affected systems, making it particularly concerning for critical infrastructure operators who may have limited visibility into their industrial web interfaces.
The vendor's position that this issue does not constitute a security risk reflects a common challenge in industrial security where the perceived risk may differ between vendors and security professionals. However, from a cybersecurity standpoint, any vulnerability that allows unauthorized access to sensitive system information represents a valid security concern, particularly in environments where such information could be used to facilitate additional attacks. The vulnerability demonstrates the importance of proper access control implementation in industrial web applications and highlights the need for comprehensive security assessments of operational technology systems. Organizations should implement network segmentation, access controls, and regular security assessments to mitigate the risk of such information disclosure vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under initial access techniques where adversaries can use information gathering to identify system weaknesses, potentially leading to more severe compromise scenarios.
Security practitioners should consider this vulnerability as part of broader industrial cybersecurity defense strategies, implementing network monitoring, access logging, and regular vulnerability assessments. The remediation approach should include updating to supported versions of the software, implementing proper authentication mechanisms, and conducting security reviews of all web-accessible industrial control system interfaces. Organizations should also establish incident response procedures that account for potential information disclosure scenarios in their operational technology environments.