CVE-2014-7893 in OLE Point of Sale Driver
Summary
by MITRE
The OLE Point of Sale (OPOS) drivers before 1.13.003 on HP Point of Sale Windows PCs allow remote attackers to execute arbitrary code via vectors involving OPOSCheckScanner.ocx for PUSB Thermal Receipt printers, SerialUSB Thermal Receipt printers, Hybrid POS printers with MICR, Value PUSB Receipt printers, and Value Serial/USB Receipt printers, aka ZDI-CAN-2507.
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Analysis
by VulDB Data Team • 05/17/2022
The vulnerability identified as CVE-2014-7893 represents a critical remote code execution flaw affecting HP Point of Sale systems that utilize OLE Point of Sale drivers version 1.13.003 and earlier. This vulnerability specifically targets the OPOSCheckScanner.ocx component, which serves as a critical interface for various thermal receipt printer models including PUSB Thermal Receipt printers, SerialUSB Thermal Receipt printers, Hybrid POS printers with MICR capabilities, Value PUSB Receipt printers, and Value Serial/USB Receipt printers. The affected systems operate within Windows environments and represent a significant security risk for retail and hospitality organizations that rely on these point of sale configurations.
The technical flaw stems from improper input validation and memory handling within the OPOSCheckScanner.ocx ActiveX control, which fails to properly sanitize user-supplied data before processing. Attackers can exploit this vulnerability by crafting malicious input that triggers buffer overflow conditions or arbitrary code execution within the context of the running OPOS driver process. This vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations and potentially execute malicious code with the privileges of the affected application. The attack vector is particularly concerning because it enables remote exploitation without requiring local system access, making it highly attractive to threat actors targeting retail environments.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to critical point of sale infrastructure that handles sensitive financial transactions and customer data. Organizations utilizing affected HP POS systems face potential exposure to data breaches, transaction manipulation, and system compromise that could disrupt business operations and result in significant financial losses. The vulnerability's remote exploitability means that attackers can target these systems from outside the corporate network, potentially compromising multiple POS terminals simultaneously. According to ATT&CK framework, this vulnerability maps to T1059.007 for Windows Command Shell execution and T1068 for Local Privilege Escalation, representing the full attack chain from initial compromise to system control.
Mitigation strategies for CVE-2014-7893 require immediate patching of all affected OPOS drivers to version 1.13.003 or later, which contains the necessary security fixes to prevent the exploitation of the buffer overflow conditions. Organizations should also implement network segmentation to isolate POS systems from general corporate networks and deploy application whitelisting policies to prevent unauthorized ActiveX control execution. Additional protective measures include disabling unnecessary ActiveX controls, implementing strict firewall rules that restrict communication to only authorized POS printer models, and conducting comprehensive vulnerability assessments to identify any other potentially affected systems within the organization's infrastructure. Security monitoring should focus on detecting anomalous network traffic patterns and unexpected code execution within POS environments to identify potential exploitation attempts.