CVE-2021-32931 in FvDesigner
Summary
by MITRE • 08/11/2021
An uninitialized pointer in FATEK Automation FvDesigner, Versions 1.5.88 and prior may be exploited while the application is processing project files, allowing an attacker to craft a special project file that may permit arbitrary code execution.
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Analysis
by VulDB Data Team • 08/16/2021
The vulnerability identified as CVE-2021-32931 represents a critical security flaw in FATEK Automation FvDesigner software versions 1.5.88 and earlier. This issue manifests as an uninitialized pointer condition that occurs during the processing of project files within the application environment. The flaw exists in the software's memory management mechanisms where pointers are not properly initialized before being utilized, creating potential pathways for malicious exploitation. The vulnerability is particularly concerning as it can be triggered through the manipulation of project files, which are standard components of the software's operational workflow.
The technical implementation of this vulnerability stems from improper memory handling within the FvDesigner application's project file parsing routines. When the software encounters specially crafted project files, the uninitialized pointer values can lead to unpredictable behavior including memory corruption and potential code execution. This type of flaw falls under the CWE-457 category of "Use of Uninitialized Variable" which is classified as a fundamental memory safety issue in software development. The uninitialized pointer condition creates a scenario where attackers can manipulate the application's memory state to redirect execution flow or inject malicious code.
Operationally, this vulnerability presents significant risks to industrial automation environments where FATEK FvDesigner is deployed. The ability to achieve arbitrary code execution through crafted project files means that attackers could potentially compromise entire automation systems, disrupt production processes, or gain unauthorized access to critical infrastructure. The attack vector is particularly dangerous because it leverages legitimate software functionality - the processing of project files - making it difficult to distinguish between benign and malicious file operations. This vulnerability can be exploited in both targeted attacks against specific installations and broader campaign activities targeting industrial control systems.
The impact of this vulnerability extends beyond simple code execution as it can enable attackers to establish persistent access within industrial environments. Security professionals should consider this vulnerability in the context of the ATT&CK framework, specifically under techniques related to initial access through malicious files and privilege escalation through code injection. Organizations using FATEK FvDesigner should implement immediate mitigations including software updates to versions beyond 1.5.88, network segmentation to limit access to affected systems, and enhanced file validation procedures. Additionally, implementing application whitelisting policies and monitoring for unusual project file processing activities can help detect potential exploitation attempts. The vulnerability highlights the importance of proper memory management practices in industrial automation software and underscores the need for comprehensive security testing of critical infrastructure applications to prevent similar issues in the future.