CVE-2012-2175 in Lotus iNotes
Summary
by MITRE
Buffer overflow in the Attachment_Times method in a certain ActiveX control in dwa85W.dll in IBM Lotus iNotes 8.5.x before 8.5.3 FP2 allows remote attackers to execute arbitrary code via a long argument.
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Analysis
by VulDB Data Team • 08/26/2025
The vulnerability identified as CVE-2012-2175 represents a critical buffer overflow flaw within IBM Lotus iNotes 8.5.x email client software, specifically affecting the Attachment_Times method in the dwa85W.dll ActiveX control. This vulnerability exists in versions prior to 8.5.3 Fix Pack 2 and poses significant security risks to organizations relying on IBM Lotus Notes email infrastructure. The flaw stems from inadequate input validation within the ActiveX control's method implementation, creating a condition where maliciously crafted input can overwrite adjacent memory locations. Such buffer overflow conditions typically occur when a program writes more data to a fixed-length buffer than it can accommodate, leading to potential memory corruption that adversaries can exploit for code execution.
The technical exploitation of this vulnerability requires remote attackers to craft a specially formatted argument that exceeds the buffer's allocated size when passed to the Attachment_Times method. This method operates within the context of an ActiveX control, which is designed to provide extended functionality within web browsers and email clients. When the malicious argument is processed, the buffer overflow allows attackers to overwrite critical memory segments including return addresses, function pointers, or other control data structures. The vulnerability aligns with CWE-121, which categorizes buffer overflow conditions where insufficient boundary checking allows data to be written beyond allocated memory regions. From an attack perspective, this represents a classic remote code execution vector that can be leveraged through web-based attacks or email attachments.
The operational impact of CVE-2012-2175 extends beyond simple code execution capabilities, as it enables attackers to potentially gain full system control of vulnerable systems. Organizations using IBM Lotus iNotes 8.5.x versions before 8.5.3 FP2 face significant risk of unauthorized access, data breaches, and potential network compromise. The vulnerability can be exploited through various attack vectors including web-based email clients, malicious email attachments, or compromised web pages that trigger the vulnerable ActiveX control. This attack surface is particularly concerning given that many organizations rely on Lotus Notes for business-critical email services, making successful exploitation potentially devastating to enterprise security. The vulnerability also maps to ATT&CK technique T1059.007, which describes the use of ActiveX controls for code execution, and T1203, which covers exploitation of remote services through buffer overflows.
Organizations should implement immediate mitigation strategies including deploying the official IBM security patches available in Fix Pack 8.5.3 FP2, which addresses this specific buffer overflow vulnerability. System administrators should also consider implementing network-level protections such as disabling ActiveX controls in web browsers for email clients, restricting access to vulnerable Lotus Notes services, and monitoring network traffic for suspicious patterns indicating exploitation attempts. Additionally, security teams should conduct thorough vulnerability assessments to identify all systems running affected versions of IBM Lotus iNotes and ensure proper patch management procedures are in place. The remediation process should include comprehensive testing of patches in controlled environments before deployment to production systems to prevent potential service disruptions. Organizations may also consider implementing additional security controls such as application whitelisting, network segmentation, and enhanced email filtering to reduce the attack surface and limit potential exploitation success.