CVE-2020-26995 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 of SGI and RGB 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-11992)
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Analysis
by VulDB Data Team • 02/12/2021
This vulnerability exists within 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 flaw specifically affects the handling of SGI and RGB image files, which are commonly used in visualization and engineering applications. When these applications process malformed or maliciously crafted files, they fail to properly validate user-supplied data, leading to a dangerous buffer overflow condition. The vulnerability is categorized as an out-of-bounds write condition where the application attempts to write data beyond the boundaries of allocated memory structures, creating a potential code execution vector. This type of vulnerability falls under CWE-121, which describes stack-based buffer overflow conditions, and more specifically aligns with CWE-787, representing out-of-bounds write vulnerabilities. The attack surface is particularly concerning as it allows for arbitrary code execution within the context of the currently running process, effectively granting attackers the same privileges as the vulnerable application.
The operational impact of this vulnerability extends beyond simple data corruption, as it enables remote code execution capabilities that could be exploited by threat actors without requiring elevated privileges. An attacker could craft malicious SGI or RGB files designed to trigger the buffer overflow condition when opened by the vulnerable applications, potentially leading to complete system compromise. The vulnerability's exploitation requires minimal user interaction, as simply opening a malicious file within the application environment would suffice to trigger the exploit. This makes it particularly dangerous in enterprise environments where visualization tools are frequently used to process external data from various sources. The flaw demonstrates poor defensive programming practices and highlights the importance of implementing proper input validation and bounds checking mechanisms. From an attack perspective, this vulnerability aligns with ATT&CK technique T1059.007, which covers command and scripting interpreter execution, as successful exploitation could allow for command execution within the application's security context.
Organizations utilizing JT2Go or Teamcenter Visualization software must implement immediate mitigations to protect against potential exploitation of this vulnerability. The primary and most effective mitigation strategy involves upgrading to version V13.1.0 or later, which includes proper input validation and bounds checking mechanisms that prevent the out-of-bounds write condition. Until such upgrades are possible, administrators should implement strict file access controls, particularly restricting the ability to open files from untrusted sources or implementing sandboxed execution environments for visualization applications. Network-level controls such as firewalls and intrusion prevention systems can be configured to block access to known malicious file types or to restrict file transfers from external sources. Additionally, security monitoring should be enhanced to detect unusual file access patterns or attempts to execute code within visualization application processes. The vulnerability also underscores the importance of secure coding practices and regular security assessments of third-party software components, as proper input validation and memory management are fundamental security requirements that should be enforced throughout the software development lifecycle. Organizations should also consider implementing application whitelisting policies to restrict execution of unauthorized visualization tools that may contain similar vulnerabilities.