CVE-2007-5722 in GlobalLink
Summary
by MITRE
Stack-based buffer overflow in a certain ActiveX control in GLChat.ocx 2.5.1.32 in GlobalLink 2.7.0.8, as used in Ourgame GLWorld and possibly other products, allows remote attackers to execute arbitrary code via a long first argument to the ConnectAndEnterRoom method, possibly involving the GLCHAT.GLChatCtrl.1 control, as originally exploited in the wild in October 2007. NOTE: some of these details are obtained from third party information. NOTE: this was originally reported as a heap-based issue by some sources.
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Analysis
by VulDB Data Team • 07/21/2024
The vulnerability identified as CVE-2007-5722 represents a critical stack-based buffer overflow flaw within the GLChat.ocx ActiveX control version 2.5.1.32, which was part of the GlobalLink 2.7.0.8 software suite. This vulnerability specifically affects the Ourgame GLWorld platform and potentially other applications that utilize the same ActiveX control. The flaw manifests when the ConnectAndEnterRoom method receives an excessively long first argument, creating a condition where memory allocated on the stack becomes overwritten beyond its intended boundaries. This particular vulnerability was actively exploited in the wild during October 2007, demonstrating its significance and the immediate threat it posed to affected systems. The control in question is identified as GLCHAT.GLChatCtrl.1, which represents the specific COM object that exposes the vulnerable functionality through its method interfaces. The original reporting of this vulnerability as a heap-based issue by some sources indicates the complexity of vulnerability classification and the potential for overlapping memory corruption patterns in software components. This misclassification highlights the challenges security researchers face when analyzing complex software components and their memory management behaviors.
The technical implementation of this vulnerability exploits fundamental weaknesses in memory management practices within ActiveX controls. The stack-based buffer overflow occurs because the ConnectAndEnterRoom method does not properly validate or constrain the length of input parameters before copying them into fixed-size stack buffers. When an attacker provides an argument that exceeds the allocated buffer size, the excess data overflows into adjacent memory locations, potentially corrupting the stack frame's return address and other critical control information. This overflow condition enables attackers to manipulate the program's execution flow by redirecting control to malicious code injected into the buffer. The vulnerability's exploitation requires the target system to have the vulnerable ActiveX control registered and accessible through Internet Explorer or other applications that support ActiveX functionality. The specific nature of this buffer overflow places it under the CWE-121 category of stack-based buffer overflow, which represents one of the most common and dangerous types of memory corruption vulnerabilities. This vulnerability type is particularly concerning because it allows for arbitrary code execution with the privileges of the compromised process, often resulting in complete system compromise.
The operational impact of CVE-2007-5722 extends beyond simple code execution to encompass complete system compromise and potential data exfiltration capabilities. When successfully exploited, attackers can gain full control over affected systems, allowing them to install malware, modify system files, establish backdoors, or access sensitive user data. The vulnerability's presence in widely deployed gaming platforms like Ourgame GLWorld meant that a large user base was potentially exposed to exploitation. The fact that this vulnerability was actively exploited in the wild during 2007 indicates that attackers recognized its value and developed working exploits against it. Organizations running affected software were particularly vulnerable because ActiveX controls are often automatically downloaded and executed without user consent, making the attack surface much broader than typical software vulnerabilities. The vulnerability's impact was further amplified by the widespread use of Internet Explorer as a platform for ActiveX control execution, meaning that even users who were not directly accessing the gaming platform could be exposed through web-based attacks. This vulnerability demonstrates the inherent risks of legacy ActiveX controls and the challenges of maintaining security in older software ecosystems.
Mitigation strategies for CVE-2007-5722 must address both immediate remediation and long-term security posture improvements. The most effective immediate solution involves removing or disabling the vulnerable GLChat.ocx ActiveX control from affected systems, which can be accomplished through registry modifications or by uninstalling the associated software components. Organizations should also implement browser security measures such as disabling ActiveX controls in Internet Explorer or configuring security zones to restrict ActiveX functionality. The vulnerability's classification as a stack-based buffer overflow suggests that memory protection mechanisms like stack canaries or address space layout randomization could have provided additional defense-in-depth. However, the most comprehensive mitigation involves updating to patched versions of the GlobalLink software or replacing it with more secure alternatives. Security administrators should also monitor for similar vulnerabilities in other ActiveX controls and legacy software components, as this vulnerability represents a pattern of insecure memory handling that was common in older software development practices. The vulnerability underscores the importance of proper input validation and memory management practices, as outlined in industry security standards and best practices for software development. Organizations should also consider implementing application whitelisting policies to prevent execution of unsigned or untrusted ActiveX controls, which would provide additional protection against similar vulnerabilities. The historical context of this vulnerability demonstrates the importance of maintaining up-to-date security patches and the risks associated with running legacy software components in modern threat environments.