CVE-2019-12811 in MyBuilder
Summary
by MITRE
ActiveX Control in MyBuilder before 6.2.2019.814 allow an attacker to execute arbitrary command via the ShellOpen method. This can be leveraged for code execution
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Analysis
by VulDB Data Team • 01/03/2024
The vulnerability identified as CVE-2019-12811 affects the ActiveX control component within MyBuilder software versions prior to 6.2.2019.814. This represents a critical security flaw that enables remote code execution through improper input validation within the ShellOpen method of the ActiveX control. The issue stems from the software's failure to properly sanitize user-supplied parameters before executing system commands, creating a pathway for malicious actors to inject and execute arbitrary code on affected systems.
The technical implementation of this vulnerability resides in the ActiveX control's ShellOpen method which accepts user input without adequate validation or sanitization. When a user interacts with the vulnerable component, the method processes the input directly without proper parameter filtering, allowing attackers to craft malicious input that gets interpreted as system commands. This design flaw aligns with CWE-78, which specifically addresses improper neutralization of special elements used in OS commands, commonly known as OS command injection. The vulnerability is particularly dangerous because ActiveX controls are typically executed with the privileges of the logged-in user, potentially enabling attackers to perform actions ranging from local privilege escalation to complete system compromise.
The operational impact of this vulnerability extends beyond simple code execution as it provides attackers with a persistent foothold within targeted environments. Attackers can leverage this weakness to download and install additional malware, establish backdoors, or perform reconnaissance activities without requiring additional exploitation vectors. The vulnerability is particularly concerning in enterprise environments where ActiveX controls are often enabled by default, creating widespread potential attack surface. According to ATT&CK framework, this vulnerability maps to T1059.003 for command and scripting interpreter, specifically the Windows Command Shell, and T1068 for exploit for privilege escalation, as the attack can potentially be used to gain elevated system privileges.
Mitigation strategies for CVE-2019-12811 primarily focus on immediate software updates and security configuration adjustments. Organizations should prioritize updating MyBuilder to version 6.2.2019.814 or later, which includes proper input validation and sanitization for the ShellOpen method. Additionally, system administrators should implement security measures such as disabling ActiveX controls in web browsers when not explicitly required, implementing application whitelisting policies, and monitoring for suspicious command execution patterns. Network segmentation and firewall rules can further limit the potential impact by restricting access to systems containing vulnerable ActiveX controls. The vulnerability also highlights the importance of regular security assessments and the need for secure coding practices, particularly in components that interact with system-level operations and user input processing.