CVE-2010-2931 in Sigplus Pro Activex Control
Summary
by MITRE
Stack-based buffer overflow in SigPlus Pro 3.74 ActiveX control allows remote attackers to execute arbitrary code via a long eighth argument (HexString) to the LCDWriteString method.
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Analysis
by VulDB Data Team • 01/21/2025
The vulnerability identified as CVE-2010-2931 represents a critical stack-based buffer overflow flaw within the SigPlus Pro 3.74 ActiveX control, a component commonly used for digital signature capture and display functionalities in Windows environments. This vulnerability specifically affects the LCDWriteString method which processes input parameters including a HexString argument that serves as the eighth parameter in the function call. The flaw arises from inadequate input validation and bounds checking within the ActiveX control implementation, creating a condition where maliciously crafted input can overwrite adjacent memory locations on the stack.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite stack memory. The attack vector is particularly concerning as it enables remote code execution through web-based exploitation, making it accessible to attackers who can deliver malicious payloads via web browsers or other attack vectors that can trigger the vulnerable ActiveX control. When a remote attacker supplies an excessively long HexString parameter to the LCDWriteString method, the buffer overflow occurs during the function's execution, potentially allowing the attacker to overwrite return addresses, function pointers, or other critical stack data structures.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the capability to completely compromise affected systems. Successful exploitation could result in arbitrary code execution with the privileges of the user running the vulnerable ActiveX control, typically the local user or potentially higher privileges if the control is executed in a privileged context. This vulnerability affects systems running Windows operating systems where the SigPlus Pro 3.74 ActiveX control is installed and accessible through web browsers or other applications that can instantiate ActiveX components. The attack requires no special privileges to initiate, making it particularly dangerous in enterprise environments where ActiveX controls may be enabled by default or through user interaction.
Mitigation strategies for this vulnerability should focus on immediate remediation through vendor-provided patches or updates to the SigPlus Pro software, as well as administrative controls to disable ActiveX controls in web browsers where they are not required. Organizations should implement the principle of least privilege by restricting ActiveX control usage and ensuring that only trusted applications and websites can instantiate these components. Network-based mitigations could include firewall rules that prevent access to known vulnerable ActiveX control endpoints and browser security configurations that disable ActiveX controls entirely or restrict them to trusted zones only. The vulnerability also highlights the importance of regular software inventory management and vulnerability scanning to identify and remediate legacy ActiveX controls that may pose similar risks. From an ATT&CK framework perspective, this vulnerability maps to techniques involving exploitation of known vulnerabilities and privilege escalation through code execution, making it a significant threat vector that requires comprehensive defensive measures across multiple security domains including endpoint protection, network security, and application security controls.