CVE-2017-13758 in ImageMagick
Summary
by MITRE
In ImageMagick 7.0.6-10, there is a heap-based buffer overflow in the TracePoint() function in MagickCore/draw.c.
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Analysis
by VulDB Data Team • 12/27/2022
The vulnerability identified as CVE-2017-13758 represents a critical heap-based buffer overflow flaw within ImageMagick's core drawing functionality. This issue manifests specifically within the TracePoint() function located in the MagickCore/draw.c source file, where improper input validation and memory management practices create exploitable conditions that can be leveraged by malicious actors. The vulnerability affects ImageMagick version 7.0.6-10 and earlier releases, making it a significant concern for systems that process untrusted image files through this software library.
The technical implementation of this buffer overflow stems from inadequate bounds checking when handling drawing operations that involve trace points within image processing workflows. When the TracePoint() function processes certain input parameters, particularly those related to coordinate values and path tracing operations, it fails to properly validate the size of memory allocations against the actual data being processed. This discrepancy allows attackers to provide crafted input that exceeds allocated buffer boundaries, resulting in memory corruption that can lead to arbitrary code execution or system instability. The vulnerability falls under CWE-121, heap-based buffer overflow, which is classified as a critical weakness in memory safety mechanisms. The flaw demonstrates characteristics consistent with CWE-787, out-of-bounds write, where the application writes data past the end of a buffer, potentially overwriting adjacent memory locations.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it provides potential attackers with pathways for remote code execution within systems that utilize ImageMagick for image processing. Attackers can exploit this weakness by crafting malicious image files that trigger the vulnerable TracePoint() function during image rendering or manipulation operations. Systems that automatically process user-uploaded images through ImageMagick, such as web applications, content management systems, or file processing services, become particularly vulnerable to exploitation. The vulnerability can be leveraged through various attack vectors including web-based file uploads, email attachments, or any scenario where untrusted image data is processed through the affected software. This aligns with ATT&CK technique T1203, Exploitation for Client Execution, where adversaries use vulnerabilities in applications to execute arbitrary code on target systems.
Mitigation strategies for CVE-2017-13758 require immediate patching of affected ImageMagick installations to version 7.0.6-11 or later, which contains the necessary fixes for the buffer overflow conditions. Organizations should implement comprehensive input validation measures and restrict image file processing to trusted sources where possible. Network segmentation and application whitelisting can help reduce the attack surface by limiting exposure to vulnerable systems. Additionally, deploying intrusion detection systems that monitor for unusual image processing activities or memory corruption patterns can aid in early detection of exploitation attempts. Security teams should also consider implementing sandboxing mechanisms for image processing operations to contain potential exploitation attempts and prevent lateral movement within affected environments. The remediation process should include thorough testing of patched systems to ensure that the vulnerability has been properly addressed without introducing regressions in functionality.