CVE-2014-9813 in ImageMagick
Summary
by MITRE
ImageMagick allows remote attackers to cause a denial of service (application crash) via a crafted viff file.
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Analysis
by VulDB Data Team • 10/31/2024
The vulnerability identified as CVE-2014-9813 represents a critical denial of service flaw within ImageMagick, a widely deployed image processing library that serves as the foundation for numerous applications across web platforms and operating systems. This vulnerability specifically targets the library's handling of viff format files, which are used for storing volumetric image data in the Visualization Image Format. The flaw manifests when ImageMagick encounters a specially crafted viff file that triggers an application crash, effectively allowing remote attackers to disrupt services without requiring authentication or elevated privileges. The vulnerability's impact extends beyond simple service interruption, as it can be exploited in automated attack scenarios that target web applications, content management systems, and other platforms that utilize ImageMagick for image processing functions.
The technical root cause of this vulnerability lies in insufficient input validation and memory management within ImageMagick's viff file parser implementation. When processing malformed viff files, the library fails to properly validate array bounds and memory allocation parameters, leading to buffer overflows and subsequent application termination. This type of vulnerability falls under the CWE-121 category of buffer overflow conditions, specifically manifesting as a heap-based buffer overflow that occurs during the parsing of structured image data. The flaw demonstrates poor error handling practices where the software does not adequately sanitize user-provided input before attempting to process it, creating an execution path that leads to memory corruption and application instability. The vulnerability is particularly concerning because viff files are often encountered in legitimate image processing workflows, making the attack surface broader than typical denial of service scenarios.
From an operational perspective, this vulnerability poses significant risks to organizations that rely on ImageMagick for image handling capabilities, as it can be exploited to disrupt critical services through simple file uploads or web requests. Attackers can leverage this vulnerability in various attack vectors including web application exploitation, file upload restrictions bypassing, and automated scanning of vulnerable systems. The impact extends to web hosting providers, content management systems, e-commerce platforms, and any service that processes user-uploaded images through ImageMagick. The vulnerability can be exploited in both authenticated and unauthenticated scenarios, depending on the specific implementation and access controls in place. Network-based attacks can be executed without requiring user interaction, making the vulnerability particularly dangerous in automated attack scenarios where multiple targets can be compromised simultaneously.
Security mitigations for CVE-2014-9813 should focus on immediate patching of affected ImageMagick installations, as the vulnerability was addressed through proper input validation and memory management improvements in subsequent releases. Organizations should implement network segmentation and access controls to limit exposure to vulnerable systems, while also deploying intrusion detection systems that can identify suspicious file processing patterns. The implementation of file type validation and content filtering mechanisms can provide additional layers of defense by preventing the processing of potentially malicious files. Additionally, system administrators should consider implementing application whitelisting policies that restrict ImageMagick usage to trusted applications and environments. Organizations should also monitor for similar vulnerabilities in other image processing libraries and maintain updated threat intelligence feeds to identify related attack patterns. The vulnerability aligns with ATT&CK technique T1499.001 which involves network denial of service attacks, and demonstrates the importance of proper input validation as outlined in security best practices for preventing buffer overflow exploits. Regular security assessments and vulnerability scanning should be conducted to identify other potential weaknesses in image processing pipelines and ensure comprehensive protection against similar attack vectors.