CVE-2016-3716 in ImageMagick
Summary
by MITRE
The MSL coder in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allows remote attackers to move arbitrary files via a crafted image.
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Analysis
by VulDB Data Team • 12/27/2024
The vulnerability identified as CVE-2016-3716 represents a critical file manipulation flaw within ImageMagick's MSL (Magick Scripting Language) coder implementation. This vulnerability affects multiple versions of ImageMagick including releases prior to 6.9.3-10 in the 6.x series and versions before 7.0.1-1 in the 7.x series. The flaw stems from inadequate input validation and improper file handling mechanisms that allow malicious actors to exploit the system's file operations through carefully crafted image files. The vulnerability specifically targets the MSL coder which processes image files that contain scripting commands, creating a pathway for arbitrary file operations to be executed remotely.
The technical exploitation of this vulnerability occurs through the manipulation of image files that contain embedded MSL commands designed to trigger file system operations. When ImageMagick processes these maliciously crafted images, the MSL coder fails to properly sanitize or validate the commands contained within the image metadata or file structure. This allows attackers to execute commands that can move, copy, delete, or otherwise manipulate files on the target system. The flaw essentially enables a remote code execution scenario where an attacker can leverage the image processing functionality to perform unauthorized file operations, potentially leading to complete system compromise.
From an operational perspective, this vulnerability poses significant risks to organizations that process image files from untrusted sources. The impact extends beyond simple file manipulation to include potential privilege escalation and system compromise, as the attacker can move files to locations where they may execute with elevated privileges. The vulnerability can be exploited through various attack vectors including web applications that accept image uploads, email attachments, or any system that processes user-provided image content. The remote nature of the attack means that exploitation can occur from anywhere on the network without requiring local access to the target system. This vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, and reflects common patterns in file system exploitation techniques documented in ATT&CK framework under T1059 for command and scripting interpreter.
Mitigation strategies for CVE-2016-3716 focus primarily on immediate version upgrades to patched releases of ImageMagick. Organizations should prioritize updating to ImageMagick versions 6.9.3-10 or later in the 6.x series and 7.0.1-1 or later in the 7.x series where the vulnerability has been addressed through improved input validation and file handling mechanisms. Additionally, implementing strict file type validation and content inspection measures can provide defense-in-depth protection. Network segmentation and access controls should be enforced to limit the potential impact of successful exploitation. Security monitoring should include detection of unusual file operations and unauthorized file movements that could indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and secure coding practices in multimedia processing libraries, particularly those handling potentially malicious user-provided content. Organizations should also consider implementing sandboxing mechanisms for image processing operations and regularly audit their image handling workflows to identify and remediate similar vulnerabilities.