CVE-2006-3465 in libtiff
Summary
by MITRE
Unspecified vulnerability in the custom tag support for the TIFF library (libtiff) before 3.8.2 allows remote attackers to cause a denial of service (instability or crash) and execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 06/24/2019
The vulnerability identified as CVE-2006-3465 represents a critical security flaw within the libtiff library's custom tag support functionality. This issue affects versions prior to 3.8.2 and demonstrates the inherent risks associated with complex multimedia processing libraries that handle diverse file formats. The vulnerability exists in the TIFF (Tagged Image File Format) library implementation, which is widely used across various operating systems and applications for image processing and manipulation tasks. The unspecified nature of the vulnerability vectors makes it particularly concerning as it suggests multiple potential attack surfaces within the custom tag processing mechanisms that could be exploited by malicious actors.
The technical flaw lies within the insufficient validation and handling of custom tags in TIFF files, which allows attackers to craft specially malformed TIFF images that trigger memory corruption or unexpected behavior in the processing routines. This vulnerability falls under the category of buffer overflows and memory corruption issues that are commonly classified under CWE-121, which deals with stack-based buffer overflow conditions. The attack vectors likely involve improper bounds checking when processing custom tag data structures, potentially leading to stack corruption, heap corruption, or other memory management issues that can result in program termination or arbitrary code execution. The vulnerability's impact extends beyond simple crashes to potentially enable remote code execution, making it a serious concern for systems that process untrusted TIFF images.
The operational impact of CVE-2006-3465 is significant across multiple domains where libtiff is utilized, including web applications, image processing servers, digital asset management systems, and various multimedia applications. Systems that automatically process or preview TIFF files from untrusted sources become vulnerable to remote exploitation, potentially allowing attackers to disrupt services or gain unauthorized access to affected systems. The vulnerability's potential for remote code execution places it within the ATT&CK framework's T1203 category, which involves exploitation of remote services and system vulnerabilities. Organizations using affected versions of libtiff may experience service disruptions, data integrity issues, and potential system compromise, particularly in environments where automated image processing occurs.
Mitigation strategies for this vulnerability should prioritize immediate patching of libtiff installations to version 3.8.2 or later, which contains the necessary fixes for the custom tag processing flaws. System administrators should implement strict input validation for all TIFF files processed by applications, particularly those handling user-uploaded content or external image sources. Network segmentation and application whitelisting can help reduce the attack surface by limiting access to vulnerable systems. Additionally, implementing intrusion detection systems that monitor for unusual TIFF file processing patterns and maintaining updated threat intelligence about similar vulnerabilities can provide early warning capabilities. Organizations should also consider deploying sandboxed environments for image processing tasks to contain potential exploits and regularly audit their software dependencies to identify other potentially vulnerable components within their infrastructure.