CVE-2021-44014 in JT2Go
Summary
by MITRE • 12/14/2021
A vulnerability has been identified in JT2Go (All versions < V13.2.0.5), Teamcenter Visualization (All versions < V13.2.0.5). The Jt1001.dll contains a use-after-free vulnerability that could be triggered while parsing specially crafted JT files. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-15057)
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Analysis
by VulDB Data Team • 12/16/2021
The vulnerability CVE-2021-44014 represents a critical use-after-free flaw in the Jt1001.dll component of Siemens JT2Go and Teamcenter Visualization software versions prior to V13.2.0.5. This issue falls under the Common Weakness Enumeration category CWE-416, which specifically addresses use-after-free conditions where program memory is accessed after it has been freed, creating potential exploitation opportunities for malicious actors. The vulnerability manifests during the parsing of specially crafted JT files, which are binary formats commonly used for 3D product data exchange in engineering and manufacturing environments.
The technical implementation of this vulnerability stems from improper memory management within the Jt1001.dll library responsible for processing JT file formats. When the software encounters malformed or maliciously constructed JT files, the parsing routine fails to properly manage memory allocation and deallocation sequences. This memory management failure creates a scenario where freed memory locations are subsequently accessed, potentially allowing an attacker to manipulate the program execution flow. The vulnerability is particularly concerning because it operates within the context of the current process, meaning successful exploitation could lead to arbitrary code execution with the privileges of the running application.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a potential pathway for privilege escalation and system compromise within engineering and manufacturing environments. These applications are frequently used in enterprise settings where they may run with elevated privileges or access sensitive product data. The vulnerability's exploitation could enable attackers to gain unauthorized access to proprietary designs, intellectual property, or critical manufacturing information. The ATT&CK framework categorizes this type of vulnerability under T1059.007 for command and scripting interpreter, as the successful exploitation could lead to further lateral movement and persistence within the network.
Organizations utilizing affected versions of JT2Go and Teamcenter Visualization should immediately implement mitigations including mandatory software updates to V13.2.0.5 or later versions that address the memory management issues in Jt1001.dll. Additionally, network segmentation and access controls should be implemented to limit exposure of these applications to untrusted users or networks. Security teams should monitor for suspicious file uploads or execution patterns that might indicate exploitation attempts. The vulnerability's nature as a use-after-free condition also necessitates enhanced input validation and sandboxing measures for JT file processing, ensuring that malformed inputs cannot trigger memory corruption behaviors. System administrators should also consider implementing application whitelisting policies to restrict execution of potentially vulnerable software components outside of controlled environments.