CVE-2007-3606 in EnjoySAP
Summary
by MITRE
Heap-based buffer overflow in the rfcguisink.rfcguisink.1 ActiveX control in the EnjoySAP SAP GUI, on systems using ASCII versions, allows remote attackers to execute arbitrary code via a long first argument to the LaunchGui function.
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Analysis
by VulDB Data Team • 09/24/2024
The CVE-2007-3606 vulnerability represents a critical heap-based buffer overflow in the rfcguisink.rfcguisink.1 ActiveX control component of the EnjoySAP SAP GUI software suite. This vulnerability specifically affects systems running ASCII versions of the software and presents a significant security risk due to its remote exploitation capabilities. The flaw manifests within the LaunchGui function where the first argument parameter is not properly validated or bounds-checked, creating an opportunity for malicious input to overwrite adjacent memory locations in the heap allocation space. Such buffer overflow conditions are particularly dangerous because they can be leveraged to execute arbitrary code with the privileges of the affected application, typically resulting in complete system compromise when exploited successfully.
The technical implementation of this vulnerability stems from improper input validation within the ActiveX control's LaunchGui method, which accepts user-supplied data without adequate bounds checking. When an attacker provides an excessively long string as the first argument parameter, the control fails to enforce length restrictions, causing the heap memory allocation to overflow. This heap corruption can be manipulated to overwrite critical memory structures including return addresses, function pointers, or other control data, enabling attackers to redirect program execution flow to malicious code. The vulnerability's classification aligns with CWE-121, heap-based buffer overflow, and represents a classic example of unsafe string handling in legacy software components that were not designed with modern security practices in mind.
The operational impact of CVE-2007-3606 extends beyond simple remote code execution to encompass complete system compromise and potential lateral movement within corporate networks. Since SAP GUI applications are commonly deployed in enterprise environments where they may run with elevated privileges, successful exploitation could provide attackers with administrative access to sensitive business systems. The vulnerability's remote nature eliminates the need for local access, making it particularly attractive to threat actors seeking to compromise systems without physical presence or initial foothold. Additionally, the widespread deployment of SAP GUI software across various organizations increases the potential attack surface significantly. This vulnerability directly maps to ATT&CK technique T1059.007 for command and script interpreter execution, as attackers can leverage the compromised system to execute malicious payloads and establish persistent access.
Mitigation strategies for CVE-2007-3606 should focus on immediate remediation through vendor-provided patches and security updates for the EnjoySAP SAP GUI software. Organizations must disable or remove the vulnerable ActiveX control from systems where it is not essential for business operations, particularly in environments where the control is exposed to untrusted networks. Network segmentation and application whitelisting can provide additional protective layers by restricting which systems can interact with vulnerable SAP GUI components. Security teams should implement comprehensive monitoring for exploitation attempts, including detection of malicious ActiveX control loading patterns and unusual LaunchGui function calls. Regular vulnerability assessments and penetration testing should be conducted to identify similar legacy components that may present comparable security risks. The vulnerability also highlights the importance of maintaining up-to-date security practices and avoiding deployment of unsupported legacy software components that lack modern security features and regular patching cycles.