CVE-2021-22758 in IGSS Definition
Summary
by MITRE • 06/11/2021
A CWE-824: Access of uninitialized pointer vulnerability exists inIGSS Definition (Def.exe) V15.0.0.21140 and prior that could result in loss of data or remote code execution due to lack validation of user-supplied input data, when a malicious CGF file is imported to IGSS Definition.
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Analysis
by VulDB Data Team • 06/14/2021
The vulnerability identified as CVE-2021-22758 represents a critical access of uninitialized pointer flaw classified under CWE-824 within the IGSS Definition software component known as Def.exe. This vulnerability affects versions 15.0.0.21140 and earlier, creating a significant security risk that could lead to either data loss or remote code execution when a maliciously crafted CGF file is imported into the system. The flaw stems from inadequate validation of user-supplied input data, which allows attackers to manipulate the software's behavior through carefully constructed malicious files.
The technical implementation of this vulnerability occurs when the Def.exe application processes imported CGF files without proper initialization checks or input sanitization. When an attacker supplies a malicious CGF file, the application's failure to validate the input data structure results in the program attempting to access memory locations that have not been properly initialized. This uninitialized pointer access creates a condition where the application's memory management becomes unpredictable, potentially allowing attackers to execute arbitrary code or cause the application to crash and lose data. The vulnerability is particularly dangerous because it operates at the core of the software's file import functionality, making it accessible through normal user interaction with the application.
The operational impact of this vulnerability extends beyond simple data corruption or application crashes, as it provides attackers with a potential pathway for remote code execution. When an attacker successfully exploits this vulnerability through a malicious CGF file, they can potentially gain control over the entire system running the affected IGSS Definition software. This risk is particularly concerning in industrial control systems and automation environments where IGSS Definition is commonly deployed, as these systems often control critical infrastructure components. The vulnerability's exploitation could lead to complete system compromise, data exfiltration, or disruption of critical operations in environments where such software is used for process control and monitoring.
Mitigation strategies for CVE-2021-22758 should focus on immediate software updates and implementation of defensive measures. Organizations should prioritize updating to the latest version of IGSS Definition software that addresses this vulnerability, as vendors typically release patches that include proper input validation and memory initialization routines. Additionally, implementing strict file import policies that restrict the types of files that can be imported, combined with network segmentation and access controls, can help reduce the attack surface. Security professionals should also consider implementing application whitelisting measures and monitoring for suspicious file import activities. The vulnerability aligns with ATT&CK techniques related to exploitation of software vulnerabilities and privilege escalation, making it a significant concern for organizations following the MITRE ATT&CK framework for threat analysis and defense planning.