CVE-2021-34306 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 BMP_Loader.dll library in affected applications lacks proper validation of user-supplied data when parsing BMP files. This could result in a memory corruption condition. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13342)
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Analysis
by VulDB Data Team • 07/16/2021
The vulnerability identified as CVE-2021-34306 represents a critical memory corruption flaw affecting JT2Go and Teamcenter Visualization applications across all versions prior to V13.2. This security weakness resides within the BMP_Loader.dll library component responsible for processing bitmap image files, creating a significant attack surface that could be exploited by malicious actors. The vulnerability stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data during BMP file parsing operations, potentially leading to arbitrary code execution within the application's operational context.
The technical nature of this flaw aligns with CWE-121, which describes stack-based buffer overflow conditions, and more specifically with CWE-125, indicating out-of-bounds read vulnerabilities that can occur when parsing malformed binary data structures. The vulnerability operates by exploiting the lack of proper bounds checking in the BMP file parser, where attacker-controlled data can manipulate memory layout and execution flow. When the BMP_Loader.dll processes a specially crafted BMP file, it fails to validate the file header fields, color table entries, or pixel data structure, allowing malicious input to overwrite adjacent memory regions and potentially redirect program execution to attacker-controlled code.
From an operational perspective, this vulnerability presents a severe risk to organizations utilizing these visualization applications, particularly in engineering and manufacturing environments where complex 3D models and technical drawings are frequently exchanged. The attack vector requires the victim to open a malicious BMP file, which could occur through social engineering tactics, email attachments, or compromised file sharing systems. Once exploited, the vulnerability allows attackers to execute arbitrary code with the privileges of the affected application, potentially enabling further lateral movement within the network or privilege escalation to system-level access. The impact extends beyond immediate code execution as it could compromise the integrity of design data, potentially leading to supply chain attacks or intellectual property theft.
Organizations should implement immediate mitigations including updating to JT2Go V13.2 or Teamcenter Visualization V13.2, which contain patches addressing the memory corruption vulnerability. Additionally, network segmentation and access controls should be enforced to limit exposure of these applications to untrusted users or external networks. Security monitoring should be enhanced to detect suspicious file access patterns and potential exploitation attempts. The vulnerability also maps to ATT&CK technique T1059.007 for command and scripting interpreter, as exploitation could enable attackers to establish persistent access through code execution. Organizations should also consider implementing application whitelisting policies and restricting file type associations for BMP files to prevent automatic execution of potentially malicious content, while maintaining proper backup and recovery procedures to address potential compromise scenarios.