CVE-2021-34324 in JT2Go
Summary
by MITRE • 07/13/2021
A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library in affected applications lacks proper validation of user-supplied data prior to performing further free operations on an object when parsing JT files. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13420)
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 07/16/2021
The vulnerability CVE-2021-34324 represents a critical code execution flaw in JT2Go and Teamcenter Visualization software versions prior to V13.2. This issue stems from insufficient input validation within the Jt981.dll library which handles JT file parsing operations. The vulnerability is particularly concerning as it affects widely used visualization and collaboration platforms in engineering and manufacturing environments where these applications process complex 3D models and technical data from various sources.
The technical root cause of this vulnerability lies in the improper handling of user-supplied data within the Jt981.dll component during JT file parsing operations. When the application processes maliciously crafted JT files, the library fails to validate the integrity and structure of the input data before performing memory operations. This lack of proper validation creates a condition where attacker-controlled data can influence the program flow and potentially lead to arbitrary code execution. The vulnerability specifically manifests when the application attempts to perform free operations on objects without adequate sanitization of the input parameters, creating a classic buffer overflow or memory corruption scenario.
The operational impact of this vulnerability extends beyond typical software exploitation scenarios as it affects enterprise-grade visualization platforms used in critical engineering workflows. Attackers could leverage this flaw to execute malicious code with the privileges of the currently running process, potentially leading to complete system compromise. In manufacturing and engineering environments where these applications process sensitive design data, the implications are particularly severe as attackers could gain access to proprietary intellectual property, design specifications, and confidential technical information. The vulnerability affects all versions prior to V13.2, indicating that a significant user base remains exposed to this risk.
Organizations should prioritize immediate mitigation efforts by upgrading to the patched versions of JT2Go and Teamcenter Visualization as provided by the vendors. The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations. From an adversarial perspective, this vulnerability maps to ATT&CK technique T1059.007 for command and scripting interpreter, and T1203 for Exploitation for Client Execution, as attackers could leverage this to execute malicious code within the application context. Additional protective measures include implementing application whitelisting policies, restricting user permissions for JT file processing, and deploying network segmentation to limit lateral movement should exploitation occur. The vulnerability demonstrates the importance of secure coding practices in third-party libraries and highlights the need for comprehensive input validation mechanisms in software components that handle external data formats.