CVE-2019-6539 in LeviStudioU
Summary
by MITRE
Several heap-based buffer overflow vulnerabilities in WECON LeviStudioU version 1.8.56 and prior have been identified, which may allow arbitrary code execution. Mat Powell, Ziad Badawi, and Natnael Samson working with Trend Micro's Zero Day Initiative, reported these vulnerabilities to NCCIC.
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Analysis
by VulDB Data Team • 07/10/2023
The heap-based buffer overflow vulnerabilities identified in WECON LeviStudioU version 1.8.56 and prior represent a critical security flaw that can potentially lead to arbitrary code execution within affected systems. These vulnerabilities arise from improper memory management practices during the processing of user-supplied data, specifically when handling certain file formats or input parameters within the software's memory allocation routines. The flaw exists in the heap memory management subsystem where insufficient bounds checking allows attackers to overwrite adjacent memory locations, potentially corrupting program execution flow and enabling malicious code injection.
The technical implementation of these buffer overflows occurs when the application processes malformed input data through heap allocation functions without adequate validation of input size or memory boundaries. This creates exploitable conditions where crafted input can cause memory corruption that leads to control flow hijacking. The vulnerabilities are classified under CWE-121 Heap-based Buffer Overflow, which specifically addresses buffer overflows that occur in heap memory allocations rather than stack-based buffers. Attackers can leverage these weaknesses by constructing malicious input that exceeds the allocated buffer size, causing data to overwrite adjacent heap memory regions containing critical program information such as return addresses, function pointers, or other control structures.
The operational impact of these vulnerabilities extends beyond simple privilege escalation scenarios, as they can be exploited through various attack vectors including malicious file uploads, network-based attacks, or social engineering campaigns targeting users who might open compromised files. When successfully exploited, these buffer overflows can result in complete system compromise, allowing attackers to execute arbitrary code with the privileges of the affected application. The attack surface is particularly concerning given that LeviStudioU is typically used in industrial automation environments where system integrity and security are paramount. These vulnerabilities align with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation, making them particularly dangerous in enterprise and industrial control system contexts.
Mitigation strategies for these heap-based buffer overflow vulnerabilities should include immediate patching of affected software versions to the latest available release from WECON. Organizations should implement network segmentation and access controls to limit exposure of vulnerable systems, while also deploying application whitelisting solutions to prevent execution of untrusted code. Input validation should be strengthened through rigorous bounds checking and memory safety mechanisms, including the implementation of address space layout randomization and data execution prevention features. Security monitoring should be enhanced to detect anomalous behavior patterns that might indicate exploitation attempts, while regular security assessments should be conducted to identify similar vulnerabilities in other industrial control system software components. The vulnerability also highlights the importance of adhering to secure coding practices and conducting regular code reviews to prevent heap memory management issues that could lead to similar exploitation opportunities.