CVE-2021-34312 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 Tiff_loader.dll library in affected applications lacks proper validation of user-supplied data when parsing TIFF files. This could result in an out of bounds write past the fixed-length heap-based buffer. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13353)
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Analysis
by VulDB Data Team • 07/16/2021
The vulnerability CVE-2021-34312 represents a critical heap-based buffer overflow condition affecting JT2Go and Teamcenter Visualization applications. This flaw exists within the Tiff_loader.dll library component that handles TIFF file parsing operations. The vulnerability stems from insufficient input validation mechanisms that fail to properly sanitize user-supplied data during the parsing process. When these applications encounter specially crafted TIFF files, the parsing routine does not adequately verify buffer boundaries, leading to an out of bounds write condition that can overwrite adjacent memory locations.
The technical implementation of this vulnerability aligns with CWE-121, heap-based buffer overflow, where the flaw occurs in heap memory allocation during TIFF file processing. The vulnerability operates through a classic buffer overflow pattern where the application attempts to write data beyond the allocated memory boundaries of a fixed-length heap-based buffer. This particular implementation allows for arbitrary code execution within the context of the current process, making it a severe privilege escalation vector. The attacker-controlled input flows directly from the TIFF file parsing routine to the memory corruption mechanism, bypassing typical input sanitization checks.
Operationally, this vulnerability presents significant risk to organizations using affected software versions as it enables remote code execution capabilities. An attacker could craft malicious TIFF files that, when opened by the vulnerable applications, would trigger the buffer overflow condition. The execution context remains within the privileges of the currently running process, potentially allowing for system compromise if the application operates with elevated permissions. This vulnerability particularly impacts engineering and design environments where TIFF files are commonly exchanged, making it a prime target for supply chain attacks or targeted exploitation campaigns.
Mitigation strategies should focus on immediate version upgrades to V13.2 or later releases where the buffer overflow has been patched. Organizations should implement strict file validation policies that prevent untrusted TIFF files from being processed by these applications. Network segmentation and application whitelisting can help reduce attack surface exposure. The vulnerability demonstrates the importance of input validation in multimedia processing libraries and aligns with ATT&CK technique T1059.007 for command and scripting interpreter execution. Regular security assessments of third-party libraries and components should be conducted to identify similar buffer overflow patterns that could lead to privilege escalation and remote code execution in enterprise environments.