CVE-2006-3743 in ImageMagick
Summary
by MITRE
Multiple buffer overflows in ImageMagick before 6.2.9 allow user-assisted attackers to execute arbitrary code via crafted XCF images.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 06/24/2019
The vulnerability identified as CVE-2006-3743 represents a critical security flaw in ImageMagick, a widely-used image processing library that handles numerous graphic file formats including XCF which is the native format for the GIMP image editor. This vulnerability specifically affects ImageMagick versions prior to 6.2.9 and stems from multiple buffer overflow conditions that occur during the processing of XCF image files. The flaw enables malicious actors to craft specially designed XCF files that, when opened or processed by vulnerable ImageMagick implementations, can trigger memory corruption and potentially allow arbitrary code execution on the target system.
The technical nature of this vulnerability involves buffer overflow conditions that occur within the XCF image parser component of ImageMagick. When processing XCF files, the software fails to properly validate the size parameters of various image elements, particularly in the handling of layers and channel data structures. This lack of proper bounds checking allows attackers to craft XCF files containing oversized data fields that exceed the allocated buffer space, leading to memory corruption. The overflow conditions can be strategically placed within different sections of the XCF format, making the attack surface broader and more difficult to fully mitigate through partial patches.
The operational impact of this vulnerability extends beyond simple code execution as it provides attackers with a powerful vector for remote exploitation. Since XCF files can be embedded in various web contexts or delivered through email attachments, an attacker could craft malicious XCF images that, when processed by a vulnerable system, would execute arbitrary code with the privileges of the user running the ImageMagick application. This could lead to complete system compromise, especially when ImageMagick is used in web applications or server environments where it processes user-uploaded images. The vulnerability is particularly dangerous because XCF files are commonly encountered in graphic design workflows and can be easily shared through various digital channels.
The exploitability of CVE-2006-3743 aligns with attack patterns documented in the MITRE ATT&CK framework under the Tactic of Execution and Persistence, as the vulnerability enables arbitrary code execution that can be leveraged for further compromise. This vulnerability also maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios that can occur when processing malformed data structures. The vulnerability demonstrates how image processing libraries can become attack vectors in modern computing environments, particularly when these libraries are used in web applications or content management systems where user input is processed without proper sanitization.
Organizations should implement immediate mitigation strategies including updating to ImageMagick version 6.2.9 or later, which contains the necessary patches to address these buffer overflow conditions. Additionally, administrators should consider implementing file type validation and content inspection mechanisms to prevent the processing of potentially malicious XCF files, particularly in environments where user-uploaded content is processed. Network-level protections such as web application firewalls and content filtering systems should be configured to block XCF file processing where possible, and regular security audits should be conducted to ensure that no vulnerable versions remain in production environments. The vulnerability underscores the importance of keeping image processing libraries updated and implementing defense-in-depth strategies to protect against similar flaws in other multimedia processing components.