CVE-2020-27293 in CNCSoft-B
Summary
by MITRE • 01/12/2021
Delta Electronics CNCSoft-B Versions 1.0.0.2 and prior has a type confusion issue while processing project files, which may allow an attacker to execute arbitrary code.
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Analysis
by VulDB Data Team • 02/11/2021
The vulnerability identified as CVE-2020-27293 affects Delta Electronics CNCSoft-B version 1.0.0.2 and earlier releases, representing a critical type confusion flaw in the software's project file processing mechanism. This type confusion vulnerability arises when the application fails to properly validate data types during parsing operations, creating opportunities for attackers to manipulate memory structures through specially crafted project files. The issue stems from inadequate input sanitization and type checking within the software's file handling routines, where the program incorrectly interprets or processes data elements that do not match their expected type definitions.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious project files that trigger improper type handling during file parsing operations. This type confusion allows attackers to manipulate the program's memory layout by causing the application to treat data as different types than originally intended, potentially leading to memory corruption and arbitrary code execution. The vulnerability specifically impacts the software's ability to correctly process project files, where the type confusion manifests during the parsing phase when the application attempts to interpret serialized data structures without proper validation of their actual data types. This flaw operates at the intersection of memory safety and input validation, making it particularly dangerous as it can be leveraged to bypass security controls and execute unauthorized operations.
From an operational perspective, this vulnerability presents significant risks to industrial control systems and manufacturing environments where Delta Electronics CNCSoft-B is deployed. The ability to execute arbitrary code remotely through project file manipulation means that attackers could potentially compromise entire production systems, disrupt manufacturing processes, or gain persistent access to critical infrastructure. The vulnerability's impact extends beyond simple code execution to encompass potential system compromise and data integrity violations, particularly in environments where these applications control critical machinery and production workflows. Organizations utilizing this software in operational technology environments face heightened risk of supply chain attacks or targeted intrusions that could result in production downtime, safety incidents, or intellectual property theft.
Mitigation strategies for CVE-2020-27293 should prioritize immediate software updates to versions that address the type confusion vulnerability through proper input validation and type checking mechanisms. System administrators should implement strict file access controls and limit user privileges when handling project files, while also deploying network segmentation to isolate industrial control systems from general network access. The vulnerability aligns with CWE-466, which addresses the improper handling of data types during processing, and may be mapped to ATT&CK technique T1059 for execution through compromised software components. Organizations should conduct thorough vulnerability assessments of their industrial control systems and implement monitoring solutions to detect anomalous file processing activities. Additionally, regular security updates, proper access controls, and network isolation measures should be maintained to prevent exploitation of similar vulnerabilities in industrial environments.