CVE-2012-4924 in Ipswcom Activex Component
Summary
by MITRE
Buffer overflow in the CxDbgPrint function in the ipswcom.dll ActiveX component 1.0.0.1 for ASUS Net4Switch 1.0.0020 allows remote attackers to execute arbitrary code via a long parameter to the Alert method.
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Analysis
by VulDB Data Team • 12/29/2024
The vulnerability identified as CVE-2012-4924 represents a critical buffer overflow flaw within the ipswcom.dll ActiveX component version 1.0.0.1, which is distributed as part of ASUS Net4Switch firmware version 1.0.0020. This vulnerability exists in the CxDbgPrint function and specifically affects the Alert method parameter handling, creating a potential remote code execution vector that could be exploited by malicious actors without authentication. The flaw stems from insufficient input validation and bounds checking within the ActiveX component, which is designed to facilitate debugging and logging operations but becomes a security liability when processing untrusted input from remote sources. The vulnerability is particularly concerning as it enables attackers to execute arbitrary code on systems running the affected firmware, potentially leading to complete system compromise and unauthorized access to network resources. This type of vulnerability falls under CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter usage through ActiveX components.
The technical implementation of this vulnerability involves the ActiveX component's failure to properly validate the length of input parameters passed to the Alert method, specifically within the CxDbgPrint function. When a remote attacker supplies a long parameter exceeding the allocated buffer space, the function fails to perform proper bounds checking, resulting in memory corruption that can be leveraged to overwrite critical memory segments including return addresses and function pointers. This memory corruption allows attackers to redirect program execution flow and inject malicious code into the running process, effectively granting them arbitrary code execution privileges on the target system. The vulnerability is particularly dangerous because ActiveX components typically run with the privileges of the user who is browsing the web, and when executed in Internet Explorer or other browsers, these components can be triggered through malicious web pages or email attachments, making the attack surface particularly broad and accessible. The exploitability of this vulnerability is enhanced by the fact that it does not require any special privileges or authentication, as the attack can be initiated remotely through network-based interactions with the affected ASUS Net4Switch device.
The operational impact of CVE-2012-4924 extends beyond simple code execution to encompass complete network infrastructure compromise and potential data exfiltration capabilities. Once successfully exploited, attackers can gain persistent access to the affected network switch, enabling them to monitor network traffic, modify network configurations, and potentially use the compromised device as a pivot point to attack other systems within the network perimeter. The vulnerability affects not only individual devices but also represents a potential threat to entire network infrastructures, as compromised switches can serve as entry points for broader network infiltration attempts. Organizations using ASUS Net4Switch firmware versions 1.0.0020 are particularly at risk, as the vulnerability affects network infrastructure components that are often overlooked in traditional security assessments and may not be subject to the same security scrutiny as other network devices. The attack vector for this vulnerability is particularly insidious as it can be initiated through web-based attacks, making it accessible to attackers regardless of their physical proximity to the network infrastructure, and potentially allowing for large-scale exploitation across multiple devices simultaneously.
Mitigation strategies for CVE-2012-4924 should focus on immediate firmware updates and network segmentation to limit the potential impact of successful exploitation attempts. The primary recommendation involves upgrading to the latest firmware version that contains patches addressing the buffer overflow vulnerability in the ipswcom.dll ActiveX component. Organizations should also implement network monitoring solutions to detect anomalous behavior that might indicate exploitation attempts, including unusual network traffic patterns or unauthorized configuration changes. Access controls should be strengthened to limit exposure of affected devices to untrusted networks, and ActiveX components should be disabled or restricted in browser environments where possible. Additionally, security teams should conduct comprehensive vulnerability assessments to identify all instances of the affected firmware versions within their network infrastructure and implement network segmentation strategies to isolate critical systems from potentially compromised network switches. The remediation process should also include disabling or removing the vulnerable ActiveX component entirely if it is not essential for business operations, as this represents the most effective means of preventing exploitation attempts. Organizations should also consider implementing intrusion detection systems that can identify and alert on known exploit patterns associated with this vulnerability, as well as maintaining updated threat intelligence feeds to stay informed about potential exploitation attempts targeting this specific vulnerability.