CVE-2012-1234 in WebAccess
Summary
by MITRE
SQL injection vulnerability in Advantech/BroadWin WebAccess 7.0 allows remote authenticated users to execute arbitrary SQL commands via a malformed URL. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0234.
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Analysis
by VulDB Data Team • 07/29/2019
This vulnerability represents a critical sql injection flaw in advantech/broadwin webaccess 7.0 software that enables remote authenticated attackers to execute arbitrary sql commands through malformed url inputs. The vulnerability stems from an incomplete remediation of a previous sql injection issue documented in cve-2012-0234, demonstrating how inadequate patching can leave systems exposed to continued exploitation. The flaw specifically affects the webaccess 7.0 platform's handling of url parameters, where insufficient input validation allows maliciously crafted urls to bypass security controls and directly manipulate underlying database queries. This type of vulnerability falls under the common weakness enumeration category of cwe-89 sql injection, which is classified as a high severity issue in the owasp top 10 web application security risks. The attack vector requires an authenticated user context, meaning that adversaries must first establish valid credentials before exploiting this weakness, though the remote execution capability significantly expands the potential impact. The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation could allow attackers to modify database contents, escalate privileges, or even gain full control over the affected webaccess system. This particular vulnerability aligns with attack technique t1071.004 in the mitre att&ck framework, which covers application layer protocol manipulation specifically targeting web application interfaces. Organizations using webaccess 7.0 should immediately implement proper input validation measures and parameterized queries to prevent sql injection attacks, while also ensuring comprehensive patch management processes to address incomplete fixes from previous vulnerabilities. The vulnerability's persistence despite prior remediation efforts highlights the critical importance of thorough security assessments and complete patch verification in enterprise environments.
The technical implementation of this vulnerability demonstrates how webaccess 7.0 fails to properly sanitize url parameters before incorporating them into sql queries. When authenticated users submit malformed urls containing sql payload injections, the application processes these inputs without adequate validation or encoding, allowing attackers to manipulate database operations. This weakness is particularly concerning because it operates at the web application layer where user inputs are directly processed into database commands, creating a direct pathway for data compromise. The incomplete fix for cve-2012-0234 suggests that previous remediation efforts were insufficient, possibly only addressing specific patterns while leaving other injection vectors open. This pattern of partial remediation is common in security vulnerabilities and represents a fundamental flaw in how organizations approach patch management and vulnerability remediation. The vulnerability's classification under cwe-89 indicates that it involves the improper handling of user-supplied data in sql contexts, where the application fails to properly separate data from commands. This architectural weakness allows attackers to inject malicious sql code through url parameters, potentially leading to unauthorized database access, data modification, or complete system compromise. The attack requires minimal technical expertise but can yield significant damage, making it particularly dangerous in enterprise environments where webaccess systems often manage critical industrial control data.
The operational implications of this vulnerability extend far beyond traditional data breach scenarios, particularly within industrial control systems where webaccess 7.0 is commonly deployed. Organizations utilizing this software in manufacturing, process control, or building automation environments face heightened risk of operational technology disruptions that could impact production processes, safety systems, or infrastructure management. The remote execution capability means that attackers can exploit this vulnerability from outside the organization's network perimeter, potentially leading to unauthorized access to critical industrial processes. This vulnerability also creates opportunities for lateral movement within networks, as successful exploitation could provide attackers with access to additional systems or databases connected to the compromised webaccess platform. The authentication requirement does not significantly limit the attack surface since many organizations maintain multiple user accounts with varying privilege levels, and credential compromise can occur through various attack vectors including phishing, credential reuse, or brute force attacks. Security teams should consider this vulnerability as part of their broader threat modeling efforts, particularly when evaluating the security of industrial control system interfaces and web-based management platforms. The vulnerability's persistence despite previous remediation efforts suggests that organizations may need to implement additional security controls beyond standard patch management, including web application firewalls, input validation layers, and comprehensive monitoring of url parameter usage within webaccess environments.
Mitigation strategies for this vulnerability should encompass both immediate technical fixes and longer-term architectural improvements to prevent similar issues in the future. Organizations must implement comprehensive input validation mechanisms that properly sanitize all url parameters before they are processed by the webaccess application, using techniques such as parameterized queries or stored procedures that separate sql commands from data inputs. The incomplete fix for cve-2012-0234 demonstrates the importance of conducting thorough security assessments after implementing patches to ensure that all related vulnerabilities have been addressed. System administrators should also consider implementing web application firewalls or security monitoring solutions that can detect and prevent sql injection attempts targeting webaccess 7.0 installations. Regular security audits and penetration testing of industrial web applications are essential to identify similar vulnerabilities that may exist in other components of the industrial control system infrastructure. Organizations should establish robust patch management processes that include verification procedures to ensure that security updates are properly applied and that previous vulnerabilities have been completely remediated. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security controls and the dangers of relying solely on partial remediation efforts that may leave systems exposed to continued exploitation. Additionally, implementing network segmentation and access controls can help limit the potential impact of successful exploitation attempts, while regular security training for personnel can help prevent credential compromise that might enable attackers to reach this vulnerability.