CVE-2020-7550 in IGSS Definition
Summary
by MITRE • 11/20/2020
A CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists in IGSS Definition (Def.exe) version 14.0.0.20247 and prior that could cause Remote Code Execution when malicious CGF (Configuration Group File) file is imported to IGSS Definition.
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Analysis
by VulDB Data Team • 12/09/2020
The vulnerability described in CVE-2020-7550 represents a critical memory safety issue affecting IGSS Definition software version 14.0.0.20247 and earlier. This flaw manifests as a CWE-119 improper restriction of operations within memory buffer bounds, specifically within the Def.exe executable component of the IGSS (Integrated Graphic System Software) suite. The vulnerability arises during the processing of CGF (Configuration Group File) input files, which are used to define system configurations and graphical elements within the IGSS environment. When a maliciously crafted CGF file is imported into the IGSS Definition application, the software fails to properly validate buffer boundaries during file parsing operations, creating opportunities for arbitrary code execution.
The technical exploitation of this vulnerability occurs through buffer overflow conditions that can be triggered when the Def.exe process attempts to parse untrusted CGF input data. The improper memory boundary checking allows attackers to overwrite adjacent memory locations, potentially leading to stack corruption or heap manipulation. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute arbitrary commands within the context of the vulnerable application. The flaw essentially creates a pathway for attackers to inject malicious code into the application's memory space, potentially allowing for privilege escalation or complete system compromise.
The operational impact of this vulnerability extends beyond simple remote code execution, as it can affect industrial control systems and graphical interface applications that rely on IGSS Definition for configuration management. Organizations using affected versions of IGSS Definition face significant risk exposure, particularly in environments where configuration files might be received from untrusted sources or where automated import processes exist. The vulnerability's remote exploitation capability means that attackers could potentially compromise systems without physical access, making it particularly dangerous in operational technology environments. This type of vulnerability is especially concerning in industrial settings where system integrity and security are paramount for operational continuity and safety.
Mitigation strategies for CVE-2020-7550 should prioritize immediate software updates to versions that address the buffer overflow conditions in Def.exe. Organizations should implement strict input validation procedures for all CGF files, including digital signature verification and content scanning before import operations. Network segmentation and access controls can help limit potential attack vectors, while regular security assessments should verify that no other applications within the IGSS ecosystem are similarly vulnerable. The vulnerability demonstrates the importance of secure coding practices, particularly around memory management and input validation, which aligns with CWE-119 requirements for proper buffer boundary checking and the ATT&CK framework's emphasis on preventing privilege escalation through memory corruption techniques. System administrators should also consider implementing application whitelisting policies to restrict execution of unauthorized CGF processing tools.