CVE-2017-8927 in VizEx
Summary
by MITRE
Buffer overflow in Larson VizEx Reader 9.7.5 allows attackers to cause a denial of service or possibly have unspecified other impact via a crafted .tif file.
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Analysis
by VulDB Data Team • 12/13/2025
The vulnerability identified as CVE-2017-8927 represents a critical buffer overflow flaw within the Larson VizEx Reader version 9.7.5 software application. This software is widely utilized for viewing and processing various image formats including tif files, making it a common component in document management systems and digital archiving solutions. The buffer overflow vulnerability specifically manifests when the application processes malformed or specially crafted .tif image files that exceed expected memory boundaries during parsing operations. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations and potentially execute arbitrary code or cause application instability.
The technical exploitation of this vulnerability occurs through the manipulation of the image file parsing routine within the VizEx Reader software. When a maliciously crafted .tif file is opened, the application's image decoding functions fail to properly validate the file structure and memory allocation requirements. This allows an attacker to construct a file that triggers memory overflow conditions during the decompression or rendering process. The vulnerability demonstrates characteristics of CWE-787 which describes out-of-bounds write operations, where the application writes data beyond the allocated buffer boundaries. The attack vector is particularly concerning as it requires no special privileges or authentication, making it accessible to remote attackers who can simply distribute the malicious file through email attachments, web downloads, or shared network drives.
From an operational impact perspective, this vulnerability creates significant security risks for organizations relying on the Larson VizEx Reader for document processing and viewing. The potential consequences extend beyond simple denial of service scenarios to include arbitrary code execution, which could allow attackers to gain full control over affected systems. The unspecified other impacts mentioned in the CVE description suggest that the vulnerability may enable additional attack vectors such as privilege escalation or information disclosure. Organizations using this software are particularly vulnerable in environments where users frequently open untrusted documents, as the attack can be initiated through simple file opening operations. The vulnerability aligns with ATT&CK technique T1203 which covers exploitation for privilege escalation, and T1059 which involves command and script injection through application execution.
Mitigation strategies for CVE-2017-8927 should prioritize immediate software updates from the vendor to address the buffer overflow vulnerability. Organizations should implement strict file validation procedures and consider deploying sandboxing solutions to isolate image file processing operations. Network-based defenses including email filtering and web proxy configurations can help prevent the delivery of malicious .tif files to end users. Additionally, security teams should monitor for any signs of exploitation attempts and implement robust incident response procedures. The vulnerability highlights the importance of regular software patch management and security assessments, particularly for legacy applications that may not receive regular security updates. Organizations should also consider implementing file type restrictions and user education programs to reduce exposure to such attack vectors. The specific memory corruption patterns associated with this vulnerability make it particularly dangerous in environments where automated document processing systems are in use, as a single compromised file could potentially affect entire document workflows.