CVE-2009-0215 in Access Support ActiveX control
Summary
by MITRE
Stack-based buffer overflow in the GetXMLValue method in the IBM Access Support ActiveX control in IbmEgath.dll, as distributed on IBM and Lenovo computers, allows remote attackers to execute arbitrary code via unspecified vectors.
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Analysis
by VulDB Data Team • 11/08/2025
The vulnerability identified as CVE-2009-0215 represents a critical stack-based buffer overflow flaw within the IBM Access Support ActiveX control component. This vulnerability specifically affects the GetXMLValue method in the IbmEgath.dll library, which is commonly distributed as part of IBM and Lenovo computer systems. The ActiveX control serves as a client-side component that facilitates communication with IBM's access support services, making it a potential attack vector for remote exploitation. The flaw stems from inadequate input validation within the GetXMLValue method, which fails to properly constrain the length of data processed from external sources. This oversight creates a condition where maliciously crafted input can overwrite adjacent memory locations on the stack, potentially leading to arbitrary code execution. The vulnerability is particularly concerning because it affects systems that are widely deployed in enterprise environments, where the IBM Access Support ActiveX control is often installed by default. Attackers can leverage this vulnerability through unspecified vectors that likely involve web-based or network-based delivery mechanisms, potentially exploiting the ActiveX control through Internet Explorer or other applications that support ActiveX components. The stack-based nature of the buffer overflow means that attackers can manipulate the return address and execution flow of the targeted process, enabling them to execute malicious code with the privileges of the affected application.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite stack memory. This flaw demonstrates the classic pattern of insufficient input validation in ActiveX controls, where the GetXMLValue method does not properly validate the length of XML data being processed. The operational impact of this vulnerability extends beyond simple code execution, as it can be leveraged to establish persistent access to affected systems. Attackers may use this vulnerability to install backdoors, escalate privileges, or deploy additional malware components. The widespread distribution of IBM and Lenovo computers that include this ActiveX control increases the potential attack surface significantly. Organizations running affected systems face substantial risk since the vulnerability can be exploited remotely without requiring user interaction, making it particularly dangerous in networked environments where systems are exposed to external threats. The exploitability of this vulnerability is enhanced by the fact that ActiveX controls are often enabled by default in Internet Explorer, providing attackers with multiple potential entry points. Additionally, the vulnerability's designation as a remote code execution flaw places it within the ATT&CK framework's technique T1059, which covers command and script interpreter execution, and T1068, which addresses exploit for privilege escalation.
Mitigation strategies for CVE-2009-0215 must address both immediate remediation and long-term security posture improvements. The primary recommendation involves disabling or removing the vulnerable IBM Access Support ActiveX control from affected systems, particularly in environments where it is not required for legitimate business operations. System administrators should also implement strict ActiveX control policies through Group Policy or similar management tools to prevent automatic execution of potentially malicious ActiveX components. Browser security settings should be configured to require user interaction before running ActiveX controls, effectively preventing automatic exploitation. Organizations should also consider implementing network segmentation and firewall rules that restrict access to systems containing vulnerable ActiveX controls. The vulnerability highlights the importance of regular security assessments and patch management processes, as it demonstrates how legacy components can remain vulnerable for extended periods. Security monitoring should include detection of ActiveX control usage patterns that might indicate exploitation attempts, particularly when these controls interact with external network resources. System hardening measures should also include disabling unnecessary ActiveX controls and ensuring that only trusted ActiveX components are allowed to execute. Additionally, organizations should consider implementing application whitelisting policies that prevent execution of untrusted code, which can help mitigate the impact of similar vulnerabilities in the future. The vulnerability underscores the necessity of maintaining current security awareness practices and regularly reviewing the security posture of deployed systems, particularly those with legacy components that may not receive ongoing security updates.