CVE-2005-0397 in ImageMagick
Summary
by MITRE
Format string vulnerability in the SetImageInfo function in image.c for ImageMagick before 6.0.2.5 may allow remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via format string specifiers in a filename argument to convert, which may be called by other web applications.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 05/31/2019
The vulnerability described in CVE-2005-0397 represents a critical format string vulnerability within ImageMagick's SetImageInfo function, specifically in the image.c source file. This flaw exists in ImageMagick versions prior to 6.0.2.5 and demonstrates a classic security weakness that has been documented under CWE-134. The vulnerability stems from improper handling of user-supplied input when processing image filenames, creating an opportunity for malicious actors to manipulate memory through carefully crafted format specifiers.
The technical exploitation of this vulnerability occurs when the convert utility, which is commonly invoked by web applications, processes a filename argument containing format string specifiers. The SetImageInfo function fails to properly validate or sanitize the input before using it in printf-style functions, allowing attackers to inject format specifiers that can manipulate the program's execution flow. This vulnerability operates at the intersection of buffer management and input validation, where the application's failure to properly handle user-controlled data creates a path for arbitrary code execution or denial of service conditions.
From an operational impact perspective, this vulnerability poses significant risks to web applications that utilize ImageMagick for image processing tasks. The remote exploitation capability means that attackers can potentially compromise systems without requiring local access, making it particularly dangerous in web-facing environments. The vulnerability can lead to application crashes that result in denial of service, disrupting legitimate user access to services that depend on image processing functionality. Additionally, the potential for arbitrary code execution creates opportunities for attackers to gain unauthorized access to affected systems, escalate privileges, or establish persistent access points.
The exploitation of this vulnerability aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to privilege escalation and execution of malicious code through application vulnerabilities. Attackers can leverage this weakness to bypass traditional security controls by targeting the application layer rather than system-level protections. The vulnerability also demonstrates characteristics consistent with CWE-134, which specifically addresses the use of untrusted data in format string operations. Organizations relying on web applications that incorporate ImageMagick must consider this vulnerability as part of their overall security posture, particularly in environments where image processing is a core functionality.
Mitigation strategies for this vulnerability should include immediate patching of ImageMagick installations to versions 6.0.2.5 or later, where the format string handling has been corrected. Additionally, organizations should implement input validation measures that prevent format specifiers from being processed in filename arguments, particularly when these inputs originate from untrusted sources. Network segmentation and application firewalls can provide additional layers of protection by limiting access to vulnerable web applications. Regular security assessments should verify that all image processing components are properly updated and that input sanitization measures are in place to prevent similar vulnerabilities from emerging in other parts of the application stack.