CVE-2021-34293 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 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-13020)
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Analysis
by VulDB Data Team • 07/16/2021
The vulnerability identified as CVE-2021-34293 affects JT2Go and Teamcenter Visualization applications versions prior to V13.2, specifically targeting the Gif_loader.dll library component. This issue represents a critical security flaw that stems from inadequate input validation during GIF file processing operations. The vulnerability manifests when the application parses user-supplied GIF files through the Gif_loader.dll module, which fails to properly validate the structure and content of these files before processing them. The root cause lies in the library's inability to handle malformed or specially crafted GIF data that could cause memory corruption during parsing operations.
The technical flaw constitutes a classic out-of-bounds write condition that occurs when the Gif_loader.dll processes GIF files containing malformed data structures. This memory corruption vulnerability allows an attacker to write data beyond the boundaries of allocated memory structures, potentially overwriting adjacent memory regions. The vulnerability is classified as a buffer overflow condition that can be exploited to execute arbitrary code within the context of the currently running process. This type of vulnerability is particularly dangerous as it can be leveraged for privilege escalation and system compromise without requiring elevated permissions to initiate the attack vector.
The operational impact of this vulnerability extends beyond simple code execution capabilities, as it provides attackers with a means to gain unauthorized access to systems running affected software versions. When an attacker successfully exploits this vulnerability through a maliciously crafted GIF file, they can execute code with the privileges of the user running the vulnerable application. This could result in complete system compromise, data exfiltration, or further lateral movement within a network environment. The vulnerability affects organizations that rely on JT2Go and Teamcenter Visualization for engineering and visualization tasks, particularly those that may receive untrusted GIF files from external sources or users.
Organizations should immediately implement mitigations including updating to versions V13.2 or later where this vulnerability has been addressed. The patching process should be prioritized as a critical security measure given the remote code execution capabilities. Additionally, network administrators should consider implementing file filtering measures to prevent the processing of untrusted GIF files within the affected applications. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and maps to ATT&CK technique T1059.007 for command and scripting interpreter execution. Organizations should also consider implementing application whitelisting controls and monitoring for suspicious file processing activities to detect potential exploitation attempts.