CVE-2014-8388 in WebAccess
Summary
by MITRE
Stack-based buffer overflow in Advantech WebAccess, formerly BroadWin WebAccess, before 8.0 allows remote attackers to execute arbitrary code via a crafted ip_address parameter in an HTML document.
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Analysis
by VulDB Data Team • 12/09/2024
The vulnerability identified as CVE-2014-8388 represents a critical stack-based buffer overflow flaw within Advantech WebAccess software, formerly known as BroadWin WebAccess, affecting versions prior to 8.0. This vulnerability resides in the web-based management interface of the industrial automation platform, which is widely deployed in manufacturing and industrial control systems. The flaw manifests when the software processes a specially crafted ip_address parameter embedded within an HTML document, creating a pathway for remote code execution that could potentially compromise entire industrial networks. The vulnerability is particularly concerning given the industrial control environment where WebAccess is commonly deployed, as it could enable attackers to gain unauthorized access to critical infrastructure systems.
The technical implementation of this buffer overflow occurs due to inadequate input validation within the software's handling of network address parameters. When a malicious HTML document containing a crafted ip_address parameter is processed by the vulnerable WebAccess software, the application fails to properly bounds-check the input data before copying it to a fixed-size stack buffer. This classic buffer overflow condition allows an attacker to overwrite adjacent memory locations, potentially including return addresses and control data structures. The vulnerability maps directly to CWE-121 Stack-based Buffer Overflow, which is categorized under the broader weakness classification of buffer overflows that occur in stack memory regions. The flaw is particularly dangerous because it operates over HTTP protocols, making it accessible via standard web browsers without requiring specialized tools or local access to the system.
The operational impact of this vulnerability extends far beyond typical enterprise environments due to the industrial nature of WebAccess deployments. Organizations utilizing this software in manufacturing, energy, and other critical infrastructure sectors face significant risks when systems are exposed to the internet or untrusted networks. Successful exploitation could allow remote attackers to execute arbitrary code with the privileges of the WebAccess service account, potentially leading to complete system compromise, data exfiltration, or disruption of industrial processes. The attack vector through HTML documents makes this vulnerability particularly insidious as it can be delivered through phishing campaigns, compromised websites, or even legitimate web services that embed malicious content. This vulnerability aligns with ATT&CK technique T1190 for Exploit Public-Facing Application, which targets vulnerabilities in externally accessible systems to establish initial access points. The widespread deployment of Advantech WebAccess in industrial environments means that a single compromised system could potentially affect entire production lines or critical infrastructure operations.
Mitigation strategies for CVE-2014-8388 primarily focus on immediate software updates and network segmentation. Organizations should prioritize upgrading to Advantech WebAccess version 8.0 or later, which includes proper input validation and bounds checking mechanisms that prevent the buffer overflow condition. Network administrators should implement strict firewall rules to restrict access to WebAccess interfaces, limiting exposure to trusted internal networks only and blocking direct internet access to these management systems. Additional protective measures include deploying web application firewalls to filter malicious HTML content, implementing network monitoring to detect unusual traffic patterns associated with exploitation attempts, and conducting regular vulnerability assessments of industrial control systems. Security teams should also consider isolating WebAccess systems in separate network segments with restricted access controls, as recommended by NIST SP 800-82 guidelines for industrial control systems security. The vulnerability underscores the importance of maintaining up-to-date industrial software and implementing defense-in-depth strategies specifically tailored for operational technology environments where the stakes of compromise are significantly higher than typical enterprise systems.