CVE-2014-9823 in ImageMagick
Summary
by MITRE
Heap-based buffer overflow in ImageMagick allows remote attackers to have unspecified impact via a crafted palm file, a different vulnerability than CVE-2014-9819.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/31/2024
The heap-based buffer overflow vulnerability in ImageMagick identified as CVE-2014-9823 represents a critical security flaw that enables remote attackers to execute arbitrary code or cause system instability through specially crafted palm image files. This vulnerability specifically affects the image processing library's handling of palm file formats, which are commonly used for storing raster graphics and bitmap images. The flaw exists in the memory management mechanisms of ImageMagick's image parsing routines where insufficient bounds checking allows attackers to overflow heap-allocated buffers during image decompression processes.
The technical implementation of this vulnerability stems from improper input validation within ImageMagick's palm file parser, which fails to adequately verify the size and structure of image data before allocating memory for processing. When a maliciously crafted palm file is processed, the parser attempts to allocate heap memory based on malformed header values or unexpected data sequences, leading to memory corruption that can be exploited to overwrite adjacent memory locations. This heap overflow condition creates opportunities for attackers to manipulate program execution flow, potentially leading to arbitrary code execution or denial of service conditions. The vulnerability is particularly concerning because it operates at the image processing layer where applications frequently handle untrusted input from network sources.
From an operational impact perspective, this vulnerability poses significant risks to systems that process image files from untrusted sources, including web applications, content management systems, and file sharing platforms. The remote exploitation capability means that attackers can trigger the vulnerability without requiring local access to the target system, making it particularly dangerous in web-facing environments. The unspecified impact mentioned in the CVE description reflects the potential for various outcomes including system crashes, privilege escalation, or complete system compromise depending on the execution environment and attack vector used. The vulnerability affects multiple versions of ImageMagick and can be exploited across different operating systems where the library is deployed, creating widespread potential impact throughout the cybersecurity landscape.
Security mitigations for CVE-2014-9823 should focus on immediate patching of affected ImageMagick installations to the latest secure versions that include proper bounds checking and memory validation mechanisms. Organizations should implement network segmentation and access controls to limit exposure of systems that process image files from external sources. Input validation and sanitization measures should be strengthened at application layers that utilize ImageMagick, including implementing strict file format validation and size limits for uploaded images. The vulnerability aligns with CWE-121 heap-based buffer overflow patterns and could potentially map to ATT&CK technique T1059.007 for command and control operations if exploited successfully. Regular security assessments and vulnerability scanning should be conducted to identify systems running vulnerable versions of ImageMagick, while monitoring for exploitation attempts in network traffic and system logs. Additionally, implementing sandboxing mechanisms for image processing operations can provide additional defense-in-depth against potential exploitation attempts.