CVE-2007-3605 in EnjoySAP
Summary
by MITRE
Stack-based buffer overflow in the kweditcontrol.kwedit.1 ActiveX control in FrontEnd\SapGui\kwedit.dll in the EnjoySAP SAP GUI allows remote attackers to execute arbitrary code via a long argument to the PrepareToPostHTML function.
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Analysis
by VulDB Data Team • 09/24/2024
The CVE-2007-3605 vulnerability represents a critical stack-based buffer overflow flaw within the kweditcontrol.kwedit.1 ActiveX control component of the EnjoySAP SAP GUI software suite. This vulnerability specifically affects the kwedit.dll library located in the FrontEnd\SapGui\ directory structure, making it a targeted attack vector for remote code execution. The flaw manifests when the PrepareToPostHTML function receives an excessively long argument that exceeds the allocated stack buffer space, creating a condition where arbitrary data can overwrite adjacent memory locations. The ActiveX control architecture inherently exposes this vulnerability to remote exploitation since the control is designed to operate within web browser environments where attackers can inject malicious payloads through crafted web pages or malicious websites. This particular vulnerability falls under the CWE-121 stack-based buffer overflow category, which is classified as a fundamental memory safety issue where insufficient bounds checking allows attackers to overwrite stack memory and potentially execute arbitrary code. The exploitability of this vulnerability is significantly enhanced by the fact that ActiveX controls are often automatically executed in internet explorer environments without user confirmation, making the attack surface particularly broad.
The technical implementation of this vulnerability stems from improper input validation within the PrepareToPostHTML function, which fails to adequately check the length of incoming arguments before copying them into fixed-size stack buffers. When a maliciously crafted argument exceeds the predetermined buffer limits, the excess data overflows into adjacent stack memory locations, potentially corrupting return addresses, function pointers, or other critical control data structures. Attackers can leverage this condition to manipulate the program execution flow by overwriting the return address on the stack with a pointer to their malicious payload, effectively hijacking the process control flow. This type of attack aligns with the ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, as successful exploitation typically results in code execution with the privileges of the affected process. The vulnerability's impact is particularly severe in environments where SAP GUI applications are deployed in web-based scenarios or when users browse untrusted websites that may contain malicious ActiveX controls.
The operational impact of CVE-2007-3605 extends beyond simple remote code execution to encompass potential system compromise and data breaches within enterprise SAP environments. Organizations utilizing SAP GUI applications in web-facing environments become particularly vulnerable since the attack can be initiated without user interaction or specialized knowledge of the system architecture. The vulnerability affects the broader SAP ecosystem where ActiveX controls are integrated, potentially allowing attackers to gain unauthorized access to sensitive business data, manipulate transactional processes, or establish persistent access points within the enterprise network. This type of vulnerability is especially concerning in financial and enterprise resource planning environments where SAP systems manage critical business operations and financial data. The exploitation of this vulnerability can result in complete system compromise, data exfiltration, and disruption of business processes, making it a high-priority security concern for organizations running affected SAP GUI versions. Security teams must consider this vulnerability as part of their comprehensive threat modeling exercises, particularly when evaluating risks associated with legacy SAP implementations and ActiveX control deployments in enterprise environments.
Mitigation strategies for CVE-2007-3605 should prioritize immediate remediation through official SAP security patches and updates that address the buffer overflow condition in the affected ActiveX control. Organizations should implement strict browser security policies that disable ActiveX controls or restrict their execution to trusted sites only, thereby reducing the attack surface for this vulnerability. Network-level defenses including web application firewalls and intrusion prevention systems can help detect and block malicious payloads targeting this specific vulnerability. Additionally, security administrators should consider implementing application whitelisting policies that prevent execution of untrusted ActiveX controls and regularly audit ActiveX installations within the enterprise environment. The vulnerability's classification as a stack-based buffer overflow makes it particularly susceptible to exploit prevention techniques such as stack canaries, address space layout randomization, and data execution prevention mechanisms. Organizations should also conduct comprehensive vulnerability assessments to identify all instances of the affected kwedit.dll component and ensure that all SAP GUI installations are updated to versions that contain the necessary security fixes. Regular security monitoring and incident response procedures should be established to detect potential exploitation attempts targeting this vulnerability, as early detection can prevent successful compromise of enterprise systems.