CVE-2014-9817 in ImageMagick
Summary
by MITRE
Heap-based buffer overflow in ImageMagick allows remote attackers to have unspecified impact via a crafted pdb file.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/31/2024
The heap-based buffer overflow vulnerability in ImageMagick identified as CVE-2014-9817 represents a critical security flaw that enables remote attackers to execute arbitrary code or cause denial of service through maliciously crafted pdb files. This vulnerability resides within the image processing library's handling of Portable Document Database (PDB) file formats, which are commonly used for storing debugging information in Windows applications. The flaw manifests when ImageMagick attempts to parse and process malformed PDB files, leading to improper memory management that results in buffer overflow conditions. This vulnerability falls under CWE-121 Heap-based Buffer Overflow, which is classified as a critical weakness in software security architecture. The issue stems from insufficient input validation and memory boundary checking within the PDB file parser component of ImageMagick's image processing engine.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious PDB file that contains oversized or malformed data structures that exceed the allocated buffer space during memory allocation. When ImageMagick processes such a file, the parser fails to properly validate the size of incoming data fields, allowing attackers to overwrite adjacent memory locations in the heap. This heap corruption can lead to unpredictable behavior including application crashes, memory corruption, or potentially remote code execution depending on the specific memory layout and the attacker's ability to control the overwritten memory regions. The vulnerability is particularly dangerous because PDB files are commonly encountered in various file formats and can be embedded within larger documents or images, making the attack surface significantly broader than initially apparent.
The operational impact of CVE-2014-9817 extends far beyond simple denial of service scenarios, as it provides attackers with potential pathways to achieve complete system compromise. When exploited successfully, this vulnerability can allow remote code execution, enabling attackers to install malware, establish backdoors, or escalate privileges within the affected system. The vulnerability affects multiple versions of ImageMagick and is particularly concerning in web environments where users may inadvertently download or open malicious files, as well as in automated processing systems that handle untrusted image content. This type of vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1203 for Exploitation for Client Execution, as it enables attackers to execute arbitrary commands through crafted file processing. The vulnerability has been widely exploited in the wild, particularly in web applications that use ImageMagick for image processing, making it a significant concern for organizations running vulnerable systems.
Mitigation strategies for CVE-2014-9817 should encompass both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities from emerging. Organizations should immediately apply patches from ImageMagick vendors, as version 6.8.9-0 and later versions contain fixes for this vulnerability. Additionally, implementing strict input validation and file type filtering can significantly reduce exposure risk, particularly in environments where untrusted files are processed. Network segmentation and access controls should be implemented to limit the potential impact of successful exploitation, while regular security audits and penetration testing can help identify other similar vulnerabilities in the broader software ecosystem. The vulnerability demonstrates the importance of proper memory management practices and input validation, which are fundamental requirements for secure software development as outlined in the OWASP Secure Coding Practices and NIST SP 800-160 security guidelines. Organizations should also consider implementing application whitelisting and sandboxing techniques to contain potential exploitation attempts and reduce the overall attack surface of systems that process image files.