CVE-2017-5509 in ImageMagick
Summary
by MITRE
coders/psd.c in ImageMagick allows remote attackers to have unspecified impact via a crafted PSD file, which triggers an out-of-bounds write.
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Analysis
by VulDB Data Team • 06/27/2024
The vulnerability identified as CVE-2017-5509 represents a critical out-of-bounds write flaw within ImageMagick's PSD file handling component. This issue resides in the coders/psd.c file which processes Photoshop Document format files, making it a significant threat to systems that process untrusted image content. The vulnerability enables remote attackers to craft malicious PSD files that can trigger unpredictable behavior when processed by ImageMagick, potentially leading to system compromise or denial of service conditions.
The technical nature of this flaw stems from insufficient input validation and boundary checking within the PSD file parser. When ImageMagick encounters a malformed PSD file, the parsing logic fails to properly validate array indices or buffer limits, resulting in data being written beyond the allocated memory boundaries. This out-of-bounds write condition creates opportunities for memory corruption that can be exploited to execute arbitrary code or cause application crashes. The vulnerability demonstrates poor defensive programming practices and highlights the importance of robust input sanitization in multimedia processing libraries.
From an operational perspective, this vulnerability poses substantial risk to web applications, content management systems, and file processing services that utilize ImageMagick for image handling. Attackers can leverage this flaw by uploading specially crafted PSD files to systems that automatically process or convert image formats, potentially leading to remote code execution on vulnerable systems. The unspecified impact mentioned in the description suggests that the consequences could range from denial of service to full system compromise, depending on the execution environment and system configuration. This makes the vulnerability particularly dangerous in multi-tenant environments or public-facing applications where users can upload arbitrary files.
The security implications extend beyond simple exploitation as this vulnerability can be chained with other flaws to create more sophisticated attack vectors. According to CWE classification, this represents a CWE-787 Out-of-bounds Write vulnerability, which falls under the broader category of memory safety issues. The ATT&CK framework would categorize this as a software exploitation technique, potentially enabling privilege escalation or lateral movement within compromised environments. Organizations should prioritize patching this vulnerability through updated ImageMagick versions and implement additional safeguards such as input validation, file type restrictions, and sandboxed processing environments to mitigate potential exploitation attempts.
Mitigation strategies should include immediate deployment of security patches from ImageMagick maintainers, implementation of file type validation at ingestion points, and deployment of network-based intrusion detection systems to monitor for exploitation attempts. Organizations should also consider implementing application-level restrictions on image processing capabilities and establishing secure file handling procedures. The vulnerability serves as a reminder of the critical importance of input validation in multimedia processing libraries and the potential for seemingly benign file format parsing to become attack vectors in modern computing environments.