CVE-2009-4453 in Sound Converter ActiveX
Summary
by MITRE
Insecure method vulnerability in SoftCab Sound Converter ActiveX control (sndConverter.ocx) 1.2 allows remote attackers to create or overwrite arbitrary files via the SaveFormat method. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 11/18/2025
The CVE-2009-4453 vulnerability represents a critical insecure method flaw within the SoftCab Sound Converter ActiveX control version 1.2, specifically manifesting in the SaveFormat method that exposes the system to arbitrary file creation and overwriting capabilities. This vulnerability falls under the category of insecure direct object reference attacks as defined by CWE-639, where the ActiveX control fails to properly validate user input before performing file system operations. The flaw stems from inadequate access control mechanisms within the control's implementation, allowing remote attackers to manipulate the SaveFormat method to target any file path on the victim's system, thereby bypassing normal file system security restrictions.
The technical exploitation of this vulnerability occurs through the manipulation of the SaveFormat method parameters, which are not properly sanitized or validated by the ActiveX control. When an attacker crafts malicious input to this method, the control executes file system operations without sufficient authorization checks, enabling the creation of new files or overwriting of existing ones in arbitrary locations on the target system. This represents a classic case of privilege escalation through insecure method implementation as outlined in the ATT&CK framework under technique T1068. The vulnerability is particularly dangerous because it can be triggered remotely through web browsers that have the ActiveX control installed, making it an attractive target for drive-by download attacks and remote code execution scenarios.
The operational impact of CVE-2009-4453 extends beyond simple file manipulation, as it provides attackers with persistent footholds on compromised systems through file overwrites that can include system-critical files or malicious payloads. The vulnerability can be exploited to install backdoors, modify system configuration files, or overwrite legitimate software components, potentially leading to complete system compromise. This aligns with ATT&CK technique T1566 which covers initial access through spearphishing attachments or malicious links that can leverage such ActiveX vulnerabilities. The attack surface is significantly expanded due to the widespread use of ActiveX controls in corporate environments, particularly in legacy systems that may not have received proper security updates or patches.
Mitigation strategies for CVE-2009-4453 should focus on immediate removal or disabling of the vulnerable SoftCab Sound Converter ActiveX control from affected systems, as the vendor has not provided patches for this specific vulnerability. Organizations should implement browser security policies that restrict ActiveX control execution, particularly in environments where such controls are not essential for business operations. The implementation of application whitelisting solutions can prevent execution of unauthorized ActiveX controls, while network-based intrusion detection systems should be configured to monitor for suspicious ActiveX method calls. Additionally, security awareness training should emphasize the risks of enabling ActiveX controls and the importance of maintaining updated security policies that restrict potentially dangerous browser plugins. This vulnerability demonstrates the critical importance of proper input validation and access control mechanisms in ActiveX controls, as recommended by CWE guidelines for secure coding practices in component-based applications.