CVE-2021-34294 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 Gif_loader.dll library in affected applications lacks proper validation of user-supplied data when parsing GIF files. This could result in an out of bounds read past the end of an allocated buffer. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13023
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Analysis
by VulDB Data Team • 07/16/2021
The vulnerability identified as CVE-2021-34294 represents a critical security flaw affecting JT2Go and Teamcenter Visualization applications across all versions prior to V13.2. This issue resides within the Gif_loader.dll library component responsible for processing GIF image files within these visualization platforms. The flaw manifests as inadequate input validation during GIF file parsing operations, creating a dangerous condition where user-supplied data can bypass normal safety checks. The vulnerability specifically enables an out of bounds read condition that occurs when the application attempts to access memory locations beyond the allocated buffer boundaries. This memory access violation creates a potential exploitation vector that could allow remote attackers to execute arbitrary code with the privileges of the currently running process.
The technical implementation of this vulnerability falls under CWE-125, which describes out-of-bounds read conditions in software systems. The flaw demonstrates characteristics consistent with memory corruption vulnerabilities that enable attackers to manipulate program execution flow through controlled data input. When a malicious GIF file is processed by the vulnerable applications, the Gif_loader.dll component fails to properly validate the file structure, particularly the image data segments that define buffer sizes and memory allocation parameters. This validation failure allows an attacker to craft specially formatted GIF files that trigger the out of bounds read condition, potentially leading to information disclosure or code execution. The vulnerability operates at the application layer and requires no special privileges to exploit, as it leverages the normal file processing functionality of the visualization software.
The operational impact of this vulnerability extends beyond simple code execution capabilities to encompass potential system compromise and data breach scenarios. Attackers could leverage this flaw to gain unauthorized access to systems running vulnerable versions of JT2Go or Teamcenter Visualization, potentially accessing sensitive engineering data, intellectual property, or proprietary design information. The affected applications typically process complex 3D models and engineering drawings, making the potential data exposure particularly significant for organizations in manufacturing, automotive, aerospace, and other engineering-intensive industries. The vulnerability's exploitation does not require elevated privileges, making it accessible to attackers with minimal access to the target system, and could be weaponized through web-based attack vectors or file transfer mechanisms.
Mitigation strategies for CVE-2021-34294 should prioritize immediate software updates to versions V13.2 or later where the vulnerability has been addressed through proper input validation and buffer management controls. Organizations should implement network segmentation and access controls to limit exposure of vulnerable applications to untrusted users or networks. Security monitoring should include detection of unusual file processing activities or attempts to access GIF files through the affected applications. The remediation process should involve comprehensive vulnerability assessment of all systems running affected software versions, with particular attention to engineering and design environments where these visualization tools are commonly deployed. Additionally, organizations should consider implementing application whitelisting controls and file type restrictions to prevent processing of untrusted GIF files, aligning with defense-in-depth principles recommended by cybersecurity frameworks such as NIST SP 800-53 and ISO 27001 standards.