CVE-2020-26982 in JT2Go
Summary
by MITRE • 01/13/2021
A vulnerability has been identified in JT2Go (All versions < V13.1.0), Teamcenter Visualization (All versions < V13.1.0). Affected applications lack proper validation of user-supplied data when parsing CG4 and CGM files. This could result in an out of bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-11898)
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Analysis
by VulDB Data Team • 02/12/2021
This vulnerability exists in JT2Go and Teamcenter Visualization software versions prior to V13.1.0, representing a critical security flaw that stems from inadequate input validation during file parsing operations. The vulnerability specifically affects the processing of CG4 and CGM file formats, which are commonly used for 3D visualization and technical data exchange in engineering and manufacturing environments. The flaw manifests as a lack of proper boundary checking when the applications parse these specific file types, creating a scenario where user-supplied data can cause memory corruption beyond allocated buffer boundaries.
The technical implementation of this vulnerability falls under the CWE-121 category of Stack-based Buffer Overflow, though it more accurately represents a heap-based buffer overflow scenario given the nature of the memory corruption. When the affected applications process malformed CG4 or CGM files, they fail to validate the size and structure of incoming data, allowing an attacker to craft malicious input that extends beyond the intended memory allocation. This out-of-bounds write condition creates an exploitable memory corruption vulnerability that can be leveraged to execute arbitrary code within the context of the running process.
The operational impact of this vulnerability extends beyond simple code execution, as it represents a significant threat to industrial control systems and engineering environments where these visualization tools are commonly deployed. Attackers could potentially exploit this vulnerability to gain unauthorized access to systems containing sensitive technical data, disrupt engineering workflows, or establish persistent access points within secure environments. The vulnerability's exploitation requires minimal privileges since it operates within the context of the currently running application, making it particularly dangerous in enterprise settings where these tools are frequently used.
From an attack perspective, this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would enable attackers to execute malicious code. The attack surface is primarily limited to users who interact with CG4 and CGM files, making it particularly concerning for environments where file sharing occurs across organizational boundaries. Security professionals should note that the vulnerability's exploitation potential is heightened by the fact that these visualization tools are often used in collaborative engineering environments where file exchange is frequent and automated processes may process untrusted input without proper validation.
Mitigation strategies should prioritize immediate patch deployment for all affected versions, as the vulnerability exists in all releases prior to V13.1.0. Organizations should implement network segmentation to limit access to these tools and establish strict file validation policies for incoming CG4 and CGM files. Additional defensive measures include deploying application whitelisting solutions, implementing strict file format validation, and monitoring for unusual file processing activities. The vulnerability demonstrates the critical importance of input validation in industrial software environments where the integrity of visualization data directly impacts operational security and system reliability.